Remove unused QObject parent arguments on options pages

In the new plugin setup scheme they are data members of the
plugin pimpl and never use the parent.

Change-Id: I28fe150393e8159064dcfbd113ce0320af50fd58
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

60 files changed, 94 insertions, 132 deletions

diff --git a/src/plugins/android/androidsettingspage.cpp b/src/plugins/android/androidsettingspage.cpp
index 7be91957e2..67c5d220dd 100644
--- a/src/plugins/android/androidsettingspage.cpp
+++ b/src/plugins/android/androidsettingspage.cpp
@@ -38,8 +38,7 @@ using namespace ProjectExplorer;
 namespace Android {
 namespace Internal {
 
-AndroidSettingsPage::AndroidSettingsPage(QObject *parent)
-    : Core::IOptionsPage(parent)
+AndroidSettingsPage::AndroidSettingsPage()
 {
     setId(Constants::ANDROID_SETTINGS_ID);
     setDisplayName(tr("Android"));
diff --git a/src/plugins/android/androidsettingspage.h b/src/plugins/android/androidsettingspage.h
index 274653f940..2cdef16852 100644
--- a/src/plugins/android/androidsettingspage.h
+++ b/src/plugins/android/androidsettingspage.h
@@ -39,7 +39,7 @@ class AndroidSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit AndroidSettingsPage(QObject *parent = nullptr);
+    AndroidSettingsPage();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/autotest/gtest/gtestsettingspage.cpp b/src/plugins/autotest/gtest/gtestsettingspage.cpp
index a500a10753..f1d4d2a827 100644
--- a/src/plugins/autotest/gtest/gtestsettingspage.cpp
+++ b/src/plugins/autotest/gtest/gtestsettingspage.cpp
@@ -40,8 +40,7 @@ static bool validateFilter(Utils::FancyLineEdit *edit, QString * /*error*/)
     return edit && GTestUtils::isValidGTestFilter(edit->text());
 }
 
-GTestSettingsWidget::GTestSettingsWidget(QWidget *parent)
-    : QWidget(parent)
+GTestSettingsWidget::GTestSettingsWidget()
 {
     m_ui.setupUi(this);
     m_ui.filterLineEdit->setValidationFunction(&validateFilter);
diff --git a/src/plugins/autotest/gtest/gtestsettingspage.h b/src/plugins/autotest/gtest/gtestsettingspage.h
index f9066f961e..3aa28fbe86 100644
--- a/src/plugins/autotest/gtest/gtestsettingspage.h
+++ b/src/plugins/autotest/gtest/gtestsettingspage.h
@@ -42,8 +42,9 @@ class GTestSettings;
 class GTestSettingsWidget : public QWidget
 {
     Q_OBJECT
+
 public:
-    explicit GTestSettingsWidget(QWidget *parent = nullptr);
+    GTestSettingsWidget();
 
     void setSettings(const GTestSettings &settings);
     GTestSettings settings() const;
diff --git a/src/plugins/autotest/qtest/qttestsettingspage.cpp b/src/plugins/autotest/qtest/qttestsettingspage.cpp
index 8652738425..f7471f99f2 100644
--- a/src/plugins/autotest/qtest/qttestsettingspage.cpp
+++ b/src/plugins/autotest/qtest/qttestsettingspage.cpp
@@ -35,8 +35,7 @@
 namespace Autotest {
 namespace Internal {
 
-QtTestSettingsWidget::QtTestSettingsWidget(QWidget *parent)
-    : QWidget(parent)
+QtTestSettingsWidget::QtTestSettingsWidget()
 {
     m_ui.setupUi(this);
     m_ui.callgrindRB->setEnabled(Utils::HostOsInfo::isAnyUnixHost()); // valgrind available on UNIX
diff --git a/src/plugins/autotest/qtest/qttestsettingspage.h b/src/plugins/autotest/qtest/qttestsettingspage.h
index 51fe5102e1..aa1e39a48e 100644
--- a/src/plugins/autotest/qtest/qttestsettingspage.h
+++ b/src/plugins/autotest/qtest/qttestsettingspage.h
@@ -42,8 +42,9 @@ class QtTestSettings;
 class QtTestSettingsWidget : public QWidget
 {
     Q_OBJECT
+
 public:
-    explicit QtTestSettingsWidget(QWidget *parent = nullptr);
+    QtTestSettingsWidget();
 
     void setSettings(const QtTestSettings &settings);
     QtTestSettings settings() const;
diff --git a/src/plugins/baremetal/gdbserverproviderssettingspage.cpp b/src/plugins/baremetal/gdbserverproviderssettingspage.cpp
index b538ebce33..fb78ef713e 100644
--- a/src/plugins/baremetal/gdbserverproviderssettingspage.cpp
+++ b/src/plugins/baremetal/gdbserverproviderssettingspage.cpp
@@ -406,8 +406,7 @@ QModelIndex GdbServerProvidersSettingsWidget::currentIndex() const
 }
 
 
-GdbServerProvidersSettingsPage::GdbServerProvidersSettingsPage(QObject *parent)
-    : Core::IOptionsPage(parent)
+GdbServerProvidersSettingsPage::GdbServerProvidersSettingsPage()
 {
     setId(Constants::GDB_PROVIDERS_SETTINGS_ID);
     setDisplayName(tr("Bare Metal"));
diff --git a/src/plugins/baremetal/gdbserverproviderssettingspage.h b/src/plugins/baremetal/gdbserverproviderssettingspage.h
index a68515526e..c41389b307 100644
--- a/src/plugins/baremetal/gdbserverproviderssettingspage.h
+++ b/src/plugins/baremetal/gdbserverproviderssettingspage.h
@@ -87,7 +87,7 @@ class GdbServerProvidersSettingsPage final : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit GdbServerProvidersSettingsPage(QObject *parent = nullptr);
+    GdbServerProvidersSettingsPage();
 
 private:
     QWidget *widget() final;
diff --git a/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.cpp b/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.cpp
index 6fb77fc7d0..01deb00b4d 100644
--- a/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.cpp
+++ b/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.cpp
@@ -39,11 +39,8 @@ namespace Beautifier {
 namespace Internal {
 namespace ArtisticStyle {
 
-ArtisticStyleOptionsPageWidget::ArtisticStyleOptionsPageWidget(ArtisticStyleSettings *settings,
-                                                               QWidget *parent) :
-    QWidget(parent),
-    ui(new Ui::ArtisticStyleOptionsPage),
-    m_settings(settings)
+ArtisticStyleOptionsPageWidget::ArtisticStyleOptionsPageWidget(ArtisticStyleSettings *settings)
+    : ui(new Ui::ArtisticStyleOptionsPage), m_settings(settings)
 {
     ui->setupUi(this);
     ui->useHomeFile->setText(ui->useHomeFile->text().replace(
diff --git a/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.h b/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.h
index fe8f604dc3..e1e9141bcb 100644
--- a/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.h
+++ b/src/plugins/beautifier/artisticstyle/artisticstyleoptionspage.h
@@ -43,8 +43,7 @@ class ArtisticStyleOptionsPageWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit ArtisticStyleOptionsPageWidget(ArtisticStyleSettings *settings,
-                                            QWidget *parent = nullptr);
+    explicit ArtisticStyleOptionsPageWidget(ArtisticStyleSettings *settings);
     ~ArtisticStyleOptionsPageWidget() override;
     void restore();
     void apply();
diff --git a/src/plugins/beautifier/generaloptionspage.cpp b/src/plugins/beautifier/generaloptionspage.cpp
index c2bec70740..ae832f0c98 100644
--- a/src/plugins/beautifier/generaloptionspage.cpp
+++ b/src/plugins/beautifier/generaloptionspage.cpp
@@ -37,8 +37,7 @@ namespace Beautifier {
 namespace Internal {
 
 GeneralOptionsPageWidget::GeneralOptionsPageWidget(const QSharedPointer<GeneralSettings> &settings,
-                                                   const QStringList &toolIds, QWidget *parent) :
-    QWidget(parent),
+                                                   const QStringList &toolIds) :
     ui(new Ui::GeneralOptionsPage),
     m_settings(settings)
 {
diff --git a/src/plugins/beautifier/generaloptionspage.h b/src/plugins/beautifier/generaloptionspage.h
index 61f7e84d77..b6335f68ad 100644
--- a/src/plugins/beautifier/generaloptionspage.h
+++ b/src/plugins/beautifier/generaloptionspage.h
@@ -44,7 +44,7 @@ class GeneralOptionsPageWidget : public QWidget
 
 public:
     explicit GeneralOptionsPageWidget(const QSharedPointer<GeneralSettings> &settings,
-                                      const QStringList &toolIds, QWidget *parent = nullptr);
+                                      const QStringList &toolIds);
     ~GeneralOptionsPageWidget() override;
     void restore();
     void apply(bool *autoFormatChanged);
diff --git a/src/plugins/clangtools/clangtoolsplugin.cpp b/src/plugins/clangtools/clangtoolsplugin.cpp
index 436fc3242a..8fcd5f61b9 100644
--- a/src/plugins/clangtools/clangtoolsplugin.cpp
+++ b/src/plugins/clangtools/clangtoolsplugin.cpp
@@ -61,8 +61,6 @@
 #include <QMessageBox>
 #include <QMenu>
 
-#include <QtPlugin>
-
 using namespace ProjectExplorer;
 
 namespace ClangTools {
@@ -71,7 +69,7 @@ namespace Internal {
 class ClangToolsOptionsPage : public Core::IOptionsPage
 {
 public:
-    explicit ClangToolsOptionsPage()
+    ClangToolsOptionsPage()
     {
         setId(Constants::SETTINGS_PAGE_ID);
         setDisplayName(QCoreApplication::translate(
diff --git a/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.cpp b/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.cpp
index d9c8f508a5..e458e7fbd5 100644
--- a/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.cpp
@@ -31,8 +31,7 @@
 namespace CMakeProjectManager {
 namespace Internal {
 
-CMakeSpecificSettingWidget::CMakeSpecificSettingWidget(QWidget *parent):
-    QWidget(parent)
+CMakeSpecificSettingWidget::CMakeSpecificSettingWidget()
 {
     m_ui.setupUi(this);
     m_ui.newFileAddedCopyToCpliSettingGroup->setId(m_ui.alwaysAskRadio,
diff --git a/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.h b/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.h
index d0b9b266bb..2d4419d0d5 100644
--- a/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.h
+++ b/src/plugins/cmakeprojectmanager/cmakespecificsettingspage.h
@@ -40,7 +40,8 @@ class CMakeSpecificSettingWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit CMakeSpecificSettingWidget(QWidget *parent = nullptr);
+    CMakeSpecificSettingWidget();
+
     void setSettings(const CMakeSpecificSettings &settings);
     CMakeSpecificSettings settings() const;
 
diff --git a/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp b/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
index b69aa2e2c9..b78f0b5dba 100644
--- a/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
+++ b/src/plugins/coreplugin/dialogs/externaltoolconfig.cpp
@@ -392,8 +392,7 @@ static void fillBaseEnvironmentComboBox(QComboBox *box)
         box->addItem(provider.displayName, Id::fromName(provider.id).toSetting());
 }
 
-ExternalToolConfig::ExternalToolConfig(QWidget *parent) :
-    QWidget(parent),
+ExternalToolConfig::ExternalToolConfig() :
     ui(new Ui::ExternalToolConfig),
     m_model(new ExternalToolModel(this))
 {
diff --git a/src/plugins/coreplugin/dialogs/externaltoolconfig.h b/src/plugins/coreplugin/dialogs/externaltoolconfig.h
index 386eeee38a..ff1b867706 100644
--- a/src/plugins/coreplugin/dialogs/externaltoolconfig.h
+++ b/src/plugins/coreplugin/dialogs/externaltoolconfig.h
@@ -86,7 +86,7 @@ class ExternalToolConfig : public QWidget
     Q_OBJECT
 
 public:
-    explicit ExternalToolConfig(QWidget *parent = nullptr);
+    ExternalToolConfig();
     ~ExternalToolConfig() override;
 
     void setTools(const QMap<QString, QList<ExternalTool *> > &tools);
diff --git a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
index d740b6ca20..86ee6146da 100644
--- a/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
+++ b/src/plugins/coreplugin/dialogs/shortcutsettings.cpp
@@ -283,8 +283,7 @@ ShortcutSettingsWidget::~ShortcutSettingsWidget()
     qDeleteAll(m_scitems);
 }
 
-ShortcutSettings::ShortcutSettings(QObject *parent)
-    : IOptionsPage(parent)
+ShortcutSettings::ShortcutSettings()
 {
     setId(Constants::SETTINGS_ID_SHORTCUTS);
     setDisplayName(tr("Keyboard"));
diff --git a/src/plugins/coreplugin/dialogs/shortcutsettings.h b/src/plugins/coreplugin/dialogs/shortcutsettings.h
index f54206cd3e..6c10c14463 100644
--- a/src/plugins/coreplugin/dialogs/shortcutsettings.h
+++ b/src/plugins/coreplugin/dialogs/shortcutsettings.h
@@ -116,7 +116,7 @@ class ShortcutSettings : public IOptionsPage
     Q_OBJECT
 
 public:
-    ShortcutSettings(QObject *parent = nullptr);
+    ShortcutSettings();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/coreplugin/mimetypesettings.cpp b/src/plugins/coreplugin/mimetypesettings.cpp
index 7b4d891339..83ed2a278b 100644
--- a/src/plugins/coreplugin/mimetypesettings.cpp
+++ b/src/plugins/coreplugin/mimetypesettings.cpp
@@ -632,9 +632,9 @@ void MimeTypeSettingsPrivate::applyUserModifiedMimeTypes(const UserMimeTypeHash
 }
 
 // MimeTypeSettingsPage
-MimeTypeSettings::MimeTypeSettings(QObject *parent)
-    : IOptionsPage(parent)
-    , d(new MimeTypeSettingsPrivate)
+
+MimeTypeSettings::MimeTypeSettings()
+    : d(new MimeTypeSettingsPrivate)
 {
     setId(Constants::SETTINGS_ID_MIMETYPES);
     setDisplayName(tr("MIME Types"));
diff --git a/src/plugins/coreplugin/mimetypesettings.h b/src/plugins/coreplugin/mimetypesettings.h
index 3d9059bbfe..a57fa46ca0 100644
--- a/src/plugins/coreplugin/mimetypesettings.h
+++ b/src/plugins/coreplugin/mimetypesettings.h
@@ -37,7 +37,7 @@ class MimeTypeSettings : public IOptionsPage
     Q_OBJECT
 
 public:
-    MimeTypeSettings(QObject *parent = nullptr);
+    MimeTypeSettings();
     ~MimeTypeSettings() override;
 
     QWidget *widget() override;
diff --git a/src/plugins/coreplugin/toolsettings.cpp b/src/plugins/coreplugin/toolsettings.cpp
index c157ad0781..8106c2f485 100644
--- a/src/plugins/coreplugin/toolsettings.cpp
+++ b/src/plugins/coreplugin/toolsettings.cpp
@@ -42,8 +42,7 @@
 using namespace Core;
 using namespace Core::Internal;
 
-ToolSettings::ToolSettings(QObject *parent) :
-    IOptionsPage(parent)
+ToolSettings::ToolSettings()
 {
     setId(Constants::SETTINGS_ID_TOOLS);
     setDisplayName(tr("External Tools"));
diff --git a/src/plugins/coreplugin/toolsettings.h b/src/plugins/coreplugin/toolsettings.h
index 28972bc213..6e20ff0706 100644
--- a/src/plugins/coreplugin/toolsettings.h
+++ b/src/plugins/coreplugin/toolsettings.h
@@ -39,7 +39,7 @@ class ToolSettings : public IOptionsPage
     Q_OBJECT
 
 public:
-    explicit ToolSettings(QObject *parent = nullptr);
+    ToolSettings();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/cpaster/fileshareprotocolsettingspage.cpp b/src/plugins/cpaster/fileshareprotocolsettingspage.cpp
index 51b254ecba..a0b160176b 100644
--- a/src/plugins/cpaster/fileshareprotocolsettingspage.cpp
+++ b/src/plugins/cpaster/fileshareprotocolsettingspage.cpp
@@ -65,8 +65,7 @@ bool FileShareProtocolSettings::equals(const FileShareProtocolSettings &rhs) con
     return displayCount == rhs.displayCount &&  path == rhs.path;
 }
 
-FileShareProtocolSettingsWidget::FileShareProtocolSettingsWidget(QWidget *parent) :
-    QWidget(parent)
+FileShareProtocolSettingsWidget::FileShareProtocolSettingsWidget()
 {
     m_ui.setupUi(this);
 
@@ -91,9 +90,8 @@ FileShareProtocolSettings FileShareProtocolSettingsWidget::settings() const
 }
 
 // ----------FileShareProtocolSettingsPage
-FileShareProtocolSettingsPage::FileShareProtocolSettingsPage(const QSharedPointer<FileShareProtocolSettings> &s,
-                                                             QObject *parent) :
-    Core::IOptionsPage(parent), m_settings(s), m_widget(nullptr)
+FileShareProtocolSettingsPage::FileShareProtocolSettingsPage(const QSharedPointer<FileShareProtocolSettings> &s)
+    : m_settings(s), m_widget(nullptr)
 {
     setId("X.CodePaster.FileSharePaster");
     setDisplayName(tr("Fileshare"));
diff --git a/src/plugins/cpaster/fileshareprotocolsettingspage.h b/src/plugins/cpaster/fileshareprotocolsettingspage.h
index 491c4fe621..aecd5d475c 100644
--- a/src/plugins/cpaster/fileshareprotocolsettingspage.h
+++ b/src/plugins/cpaster/fileshareprotocolsettingspage.h
@@ -54,10 +54,12 @@ inline bool operator==(const FileShareProtocolSettings &s1, const FileShareProto
 inline bool operator!=(const FileShareProtocolSettings &s1, const FileShareProtocolSettings &s2)
 { return !s1.equals(s2); }
 
-class FileShareProtocolSettingsWidget : public QWidget {
+class FileShareProtocolSettingsWidget : public QWidget
+{
     Q_OBJECT
+
 public:
-    explicit FileShareProtocolSettingsWidget(QWidget *parent = nullptr);
+    FileShareProtocolSettingsWidget();
 
     void setSettings(const FileShareProtocolSettings &);
     FileShareProtocolSettings settings() const;
@@ -71,8 +73,7 @@ class FileShareProtocolSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit FileShareProtocolSettingsPage(const QSharedPointer<FileShareProtocolSettings> &s,
-                                           QObject *parent = nullptr);
+    explicit FileShareProtocolSettingsPage(const QSharedPointer<FileShareProtocolSettings> &s);
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/cpptools/cppcodemodelsettingspage.cpp b/src/plugins/cpptools/cppcodemodelsettingspage.cpp
index af5f6b1fd2..dc1c02414e 100644
--- a/src/plugins/cpptools/cppcodemodelsettingspage.cpp
+++ b/src/plugins/cpptools/cppcodemodelsettingspage.cpp
@@ -41,9 +41,8 @@
 using namespace CppTools;
 using namespace CppTools::Internal;
 
-CppCodeModelSettingsWidget::CppCodeModelSettingsWidget(QWidget *parent)
-    : QWidget(parent)
-    , m_ui(new Ui::CppCodeModelSettingsPage)
+CppCodeModelSettingsWidget::CppCodeModelSettingsWidget()
+    : m_ui(new Ui::CppCodeModelSettingsPage)
 {
     m_ui->setupUi(this);
     m_ui->expensiveChecksHintIcon->setPixmap(Utils::Icons::WARNING.pixmap());
@@ -184,10 +183,8 @@ bool CppCodeModelSettingsWidget::applyGeneralWidgetsToSettings() const
     return settingsChanged;
 }
 
-CppCodeModelSettingsPage::CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings,
-                                                   QObject *parent)
-    : Core::IOptionsPage(parent)
-    , m_settings(settings)
+CppCodeModelSettingsPage::CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings)
+    : m_settings(settings)
 {
     setId(Constants::CPP_CODE_MODEL_SETTINGS_ID);
     setDisplayName(QCoreApplication::translate("CppTools",Constants::CPP_CODE_MODEL_SETTINGS_NAME));
diff --git a/src/plugins/cpptools/cppcodemodelsettingspage.h b/src/plugins/cpptools/cppcodemodelsettingspage.h
index 5ccb5fb37f..4f0722a805 100644
--- a/src/plugins/cpptools/cppcodemodelsettingspage.h
+++ b/src/plugins/cpptools/cppcodemodelsettingspage.h
@@ -46,7 +46,7 @@ class CppCodeModelSettingsWidget: public QWidget
     Q_OBJECT
 
 public:
-    explicit CppCodeModelSettingsWidget(QWidget *parent = nullptr);
+    CppCodeModelSettingsWidget();
     ~CppCodeModelSettingsWidget() override;
 
     void setSettings(const QSharedPointer<CppCodeModelSettings> &s);
@@ -67,8 +67,7 @@ private:
 class CppCodeModelSettingsPage: public Core::IOptionsPage
 {
 public:
-    explicit CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings,
-                                      QObject *parent = nullptr);
+    explicit CppCodeModelSettingsPage(QSharedPointer<CppCodeModelSettings> &settings);
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/cpptools/cppfilesettingspage.cpp b/src/plugins/cpptools/cppfilesettingspage.cpp
index 5ee5ef22cf..b6f7fb5720 100644
--- a/src/plugins/cpptools/cppfilesettingspage.cpp
+++ b/src/plugins/cpptools/cppfilesettingspage.cpp
@@ -252,8 +252,7 @@ QString CppFileSettings::licenseTemplate()
 
 // ------------------ CppFileSettingsWidget
 
-CppFileSettingsWidget::CppFileSettingsWidget(QWidget *parent) :
-    QWidget(parent),
+CppFileSettingsWidget::CppFileSettingsWidget() :
     m_ui(new Internal::Ui::CppFileSettingsPage)
 {
     m_ui->setupUi(this);
@@ -351,9 +350,7 @@ void CppFileSettingsWidget::slotEdit()
 }
 
 // --------------- CppFileSettingsPage
-CppFileSettingsPage::CppFileSettingsPage(QSharedPointer<CppFileSettings> &settings,
-                                         QObject *parent) :
-    Core::IOptionsPage(parent),
+CppFileSettingsPage::CppFileSettingsPage(QSharedPointer<CppFileSettings> &settings) :
     m_settings(settings)
 {
     setId(Constants::CPP_FILE_SETTINGS_ID);
@@ -363,7 +360,6 @@ CppFileSettingsPage::CppFileSettingsPage(QSharedPointer<CppFileSettings> &settin
 
 QWidget *CppFileSettingsPage::widget()
 {
-
     if (!m_widget) {
         m_widget = new CppFileSettingsWidget;
         m_widget->setSettings(*m_settings);
diff --git a/src/plugins/cpptools/cppfilesettingspage.h b/src/plugins/cpptools/cppfilesettingspage.h
index 5375664828..4a88e5af5e 100644
--- a/src/plugins/cpptools/cppfilesettingspage.h
+++ b/src/plugins/cpptools/cppfilesettingspage.h
@@ -70,7 +70,7 @@ class CppFileSettingsWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit CppFileSettingsWidget(QWidget *parent = nullptr);
+    CppFileSettingsWidget();
     ~CppFileSettingsWidget() override;
 
     CppFileSettings settings() const;
@@ -87,8 +87,7 @@ private:
 class CppFileSettingsPage : public Core::IOptionsPage
 {
 public:
-    explicit CppFileSettingsPage(QSharedPointer<CppFileSettings> &settings,
-                                 QObject *parent = nullptr);
+    explicit CppFileSettingsPage(QSharedPointer<CppFileSettings> &settings);
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/debugger/cdb/cdboptionspage.cpp b/src/plugins/debugger/cdb/cdboptionspage.cpp
index 868e554d78..1bf4fb4da4 100644
--- a/src/plugins/debugger/cdb/cdboptionspage.cpp
+++ b/src/plugins/debugger/cdb/cdboptionspage.cpp
@@ -154,9 +154,8 @@ QStringList CdbBreakEventWidget::breakEvents() const
     return rc;
 }
 
-CdbOptionsPageWidget::CdbOptionsPageWidget(QWidget *parent)
-    : QWidget(parent)
-    , m_breakEventWidget(new CdbBreakEventWidget)
+CdbOptionsPageWidget::CdbOptionsPageWidget()
+    : m_breakEventWidget(new CdbBreakEventWidget)
 {
     m_ui.setupUi(this);
     // Squeeze the groupbox layouts vertically to
diff --git a/src/plugins/debugger/cdb/cdboptionspage.h b/src/plugins/debugger/cdb/cdboptionspage.h
index 9411672175..03c1bec13e 100644
--- a/src/plugins/debugger/cdb/cdboptionspage.h
+++ b/src/plugins/debugger/cdb/cdboptionspage.h
@@ -71,7 +71,8 @@ class CdbOptionsPageWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit CdbOptionsPageWidget(QWidget *parent = nullptr);
+    CdbOptionsPageWidget();
+
     QStringList breakEvents() const;
 
     Utils::SavedActionSet group;
@@ -91,7 +92,7 @@ class CdbOptionsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit CdbOptionsPage();
+    CdbOptionsPage();
     ~CdbOptionsPage() override;
 
     // IOptionsPage
@@ -111,7 +112,7 @@ class CdbPathsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit CdbPathsPage();
+    CdbPathsPage();
     ~CdbPathsPage() override;
 
     static CdbPathsPage *instance();
diff --git a/src/plugins/designer/settingspage.cpp b/src/plugins/designer/settingspage.cpp
index 3b92fbba63..f038b7a4db 100644
--- a/src/plugins/designer/settingspage.cpp
+++ b/src/plugins/designer/settingspage.cpp
@@ -66,8 +66,7 @@ void SettingsPage::finish()
     delete m_widget;
 }
 
-SettingsPageProvider::SettingsPageProvider(QObject *parent)
-    : IOptionsPageProvider(parent)
+SettingsPageProvider::SettingsPageProvider()
 {
     setCategory(Designer::Constants::SETTINGS_CATEGORY);
     setDisplayCategory(QCoreApplication::translate("Designer",
diff --git a/src/plugins/designer/settingspage.h b/src/plugins/designer/settingspage.h
index 6fc13cbb01..13de3c2808 100644
--- a/src/plugins/designer/settingspage.h
+++ b/src/plugins/designer/settingspage.h
@@ -60,7 +60,7 @@ class SettingsPageProvider : public Core::IOptionsPageProvider
     Q_OBJECT
 
 public:
-    explicit SettingsPageProvider(QObject *parent = nullptr);
+    SettingsPageProvider();
 
     QList<Core::IOptionsPage *> pages() const override;
     bool matches(const QString &searchKeyWord) const override;
diff --git a/src/plugins/ios/iossettingspage.cpp b/src/plugins/ios/iossettingspage.cpp
index efe98a1012..cc1ce8e6be 100644
--- a/src/plugins/ios/iossettingspage.cpp
+++ b/src/plugins/ios/iossettingspage.cpp
@@ -35,8 +35,7 @@
 namespace Ios {
 namespace Internal {
 
-IosSettingsPage::IosSettingsPage(QObject *parent)
-    : Core::IOptionsPage(parent)
+IosSettingsPage::IosSettingsPage()
 {
     setId(Constants::IOS_SETTINGS_ID);
     setDisplayName(tr("iOS"));
diff --git a/src/plugins/ios/iossettingspage.h b/src/plugins/ios/iossettingspage.h
index 6841184ad1..fd3cb96921 100644
--- a/src/plugins/ios/iossettingspage.h
+++ b/src/plugins/ios/iossettingspage.h
@@ -39,7 +39,7 @@ class IosSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit IosSettingsPage(QObject *parent = nullptr);
+    IosSettingsPage();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/ios/iossettingswidget.cpp b/src/plugins/ios/iossettingswidget.cpp
index 467ded471d..29346b4328 100644
--- a/src/plugins/ios/iossettingswidget.cpp
+++ b/src/plugins/ios/iossettingswidget.cpp
@@ -62,9 +62,8 @@ static void onSimOperation(const SimulatorInfo &simInfo, SimulatorOperationDialo
     dlg->addMessage(simInfo, response, contextStr);
 }
 
-IosSettingsWidget::IosSettingsWidget(QWidget *parent)
-    : QWidget(parent),
-      m_ui(new Ui::IosSettingsWidget),
+IosSettingsWidget::IosSettingsWidget()
+    : m_ui(new Ui::IosSettingsWidget),
       m_simControl(new SimulatorControl(this))
 {
     m_ui->setupUi(this);
diff --git a/src/plugins/ios/iossettingswidget.h b/src/plugins/ios/iossettingswidget.h
index d0dc9d0af4..535a04f45e 100644
--- a/src/plugins/ios/iossettingswidget.h
+++ b/src/plugins/ios/iossettingswidget.h
@@ -33,15 +33,13 @@ namespace Ios {
 namespace Internal {
 
 namespace Ui { class IosSettingsWidget; }
-class SimulatorInfoModel;
-using SimulatorInfoList = QList<SimulatorInfo>;
 
 class IosSettingsWidget : public QWidget
 {
     Q_OBJECT
 
 public:
-    IosSettingsWidget(QWidget *parent = nullptr);
+    IosSettingsWidget();
     ~IosSettingsWidget() override;
 
     void saveSettings();
diff --git a/src/plugins/nim/settings/nimcodestylesettingspage.cpp b/src/plugins/nim/settings/nimcodestylesettingspage.cpp
index 0c3d6dd0f2..d93f4d3ed0 100644
--- a/src/plugins/nim/settings/nimcodestylesettingspage.cpp
+++ b/src/plugins/nim/settings/nimcodestylesettingspage.cpp
@@ -42,9 +42,8 @@ using namespace TextEditor;
 
 namespace Nim {
 
-NimCodeStyleSettingsPage::NimCodeStyleSettingsPage(QWidget *parent)
-    : Core::IOptionsPage(parent)
-    , m_nimCodeStylePreferences(nullptr)
+NimCodeStyleSettingsPage::NimCodeStyleSettingsPage()
+    : m_nimCodeStylePreferences(nullptr)
     , m_widget(nullptr)
 {
     setId(Nim::Constants::C_NIMCODESTYLESETTINGSPAGE_ID);
diff --git a/src/plugins/nim/settings/nimcodestylesettingspage.h b/src/plugins/nim/settings/nimcodestylesettingspage.h
index 5f492c4ad0..2f1f779ecb 100644
--- a/src/plugins/nim/settings/nimcodestylesettingspage.h
+++ b/src/plugins/nim/settings/nimcodestylesettingspage.h
@@ -41,7 +41,7 @@ class NimCodeStyleSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit NimCodeStyleSettingsPage(QWidget *parent = nullptr);
+    NimCodeStyleSettingsPage();
     ~NimCodeStyleSettingsPage() override;
 
     QWidget *widget() override;
diff --git a/src/plugins/projectexplorer/devicesupport/devicesettingspage.cpp b/src/plugins/projectexplorer/devicesupport/devicesettingspage.cpp
index 26d3f968e7..06344e68ba 100644
--- a/src/plugins/projectexplorer/devicesupport/devicesettingspage.cpp
+++ b/src/plugins/projectexplorer/devicesupport/devicesettingspage.cpp
@@ -35,8 +35,7 @@
 namespace ProjectExplorer {
 namespace Internal {
 
-DeviceSettingsPage::DeviceSettingsPage(QObject *parent)
-    : Core::IOptionsPage(parent)
+DeviceSettingsPage::DeviceSettingsPage()
 {
     setId(Constants::DEVICE_SETTINGS_PAGE_ID);
     setDisplayName(tr("Devices"));
diff --git a/src/plugins/projectexplorer/devicesupport/devicesettingspage.h b/src/plugins/projectexplorer/devicesupport/devicesettingspage.h
index d652ad3c50..1bb167a19d 100644
--- a/src/plugins/projectexplorer/devicesupport/devicesettingspage.h
+++ b/src/plugins/projectexplorer/devicesupport/devicesettingspage.h
@@ -39,7 +39,7 @@ class DeviceSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    DeviceSettingsPage(QObject *parent = nullptr);
+    DeviceSettingsPage();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/projectexplorer/devicesupport/devicesettingswidget.cpp b/src/plugins/projectexplorer/devicesupport/devicesettingswidget.cpp
index af42589622..f33607b5c9 100644
--- a/src/plugins/projectexplorer/devicesupport/devicesettingswidget.cpp
+++ b/src/plugins/projectexplorer/devicesupport/devicesettingswidget.cpp
@@ -85,9 +85,8 @@ private:
     const DeviceManager * const m_deviceManager;
 };
 
-DeviceSettingsWidget::DeviceSettingsWidget(QWidget *parent)
-    : QWidget(parent),
-      m_ui(new Ui::DeviceSettingsWidget),
+DeviceSettingsWidget::DeviceSettingsWidget()
+    : m_ui(new Ui::DeviceSettingsWidget),
       m_deviceManager(DeviceManager::cloneInstance()),
       m_deviceManagerModel(new DeviceManagerModel(m_deviceManager, this)),
       m_nameValidator(new NameValidator(m_deviceManager, this)),
diff --git a/src/plugins/projectexplorer/devicesupport/devicesettingswidget.h b/src/plugins/projectexplorer/devicesupport/devicesettingswidget.h
index a7961e145d..8c2affa802 100644
--- a/src/plugins/projectexplorer/devicesupport/devicesettingswidget.h
+++ b/src/plugins/projectexplorer/devicesupport/devicesettingswidget.h
@@ -49,7 +49,7 @@ class DeviceSettingsWidget : public QWidget
 {
     Q_OBJECT
 public:
-    DeviceSettingsWidget(QWidget *parent = nullptr);
+    DeviceSettingsWidget();
     ~DeviceSettingsWidget() override;
 
     void saveSettings();
diff --git a/src/plugins/projectexplorer/devicesupport/sshsettingspage.cpp b/src/plugins/projectexplorer/devicesupport/sshsettingspage.cpp
index 152467c93e..289820d437 100644
--- a/src/plugins/projectexplorer/devicesupport/sshsettingspage.cpp
+++ b/src/plugins/projectexplorer/devicesupport/sshsettingspage.cpp
@@ -74,7 +74,7 @@ private:
     bool m_keygenPathChanged = false;
 };
 
-SshSettingsPage::SshSettingsPage(QObject *parent) : Core::IOptionsPage(parent)
+SshSettingsPage::SshSettingsPage()
 {
     setId(Constants::SSH_SETTINGS_PAGE_ID);
     setDisplayName(tr("SSH"));
diff --git a/src/plugins/projectexplorer/devicesupport/sshsettingspage.h b/src/plugins/projectexplorer/devicesupport/sshsettingspage.h
index 3c6167bba7..14e7f00acb 100644
--- a/src/plugins/projectexplorer/devicesupport/sshsettingspage.h
+++ b/src/plugins/projectexplorer/devicesupport/sshsettingspage.h
@@ -39,7 +39,7 @@ class SshSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    SshSettingsPage(QObject *parent = nullptr);
+    SshSettingsPage();
 
 private:
     QWidget *widget() override;
diff --git a/src/plugins/qbsprojectmanager/qbsprofilessettingspage.cpp b/src/plugins/qbsprojectmanager/qbsprofilessettingspage.cpp
index 5a79d42062..3f3fe351ce 100644
--- a/src/plugins/qbsprojectmanager/qbsprofilessettingspage.cpp
+++ b/src/plugins/qbsprojectmanager/qbsprofilessettingspage.cpp
@@ -52,7 +52,7 @@ class QbsProfilesSettingsWidget : public QWidget
 {
     Q_OBJECT
 public:
-    QbsProfilesSettingsWidget(QWidget *parent = nullptr);
+    QbsProfilesSettingsWidget();
 
     void apply();
 
@@ -64,10 +64,8 @@ private:
     qbs::SettingsModel m_model;
 };
 
-QbsProfilesSettingsPage::QbsProfilesSettingsPage(QObject *parent)
-    : Core::IOptionsPage(parent)
-    , m_useQtcSettingsDirPersistent(QbsProjectManagerSettings::useCreatorSettingsDirForQbs())
-
+QbsProfilesSettingsPage::QbsProfilesSettingsPage()
+    : m_useQtcSettingsDirPersistent(QbsProjectManagerSettings::useCreatorSettingsDirForQbs())
 {
     setId("Y.QbsProfiles");
     setDisplayName(QCoreApplication::translate("QbsProjectManager", "Qbs"));
@@ -97,9 +95,8 @@ void QbsProfilesSettingsPage::finish()
 }
 
 
-QbsProfilesSettingsWidget::QbsProfilesSettingsWidget(QWidget *parent)
-    : QWidget(parent)
-    , m_model(QbsProjectManagerSettings::qbsSettingsBaseDir(), qbs::Settings::UserScope)
+QbsProfilesSettingsWidget::QbsProfilesSettingsWidget()
+    : m_model(QbsProjectManagerSettings::qbsSettingsBaseDir(), qbs::Settings::UserScope)
 {
     m_model.setEditable(false);
     m_ui.setupUi(this);
diff --git a/src/plugins/qbsprojectmanager/qbsprofilessettingspage.h b/src/plugins/qbsprojectmanager/qbsprofilessettingspage.h
index f146b92c72..6227c6f999 100644
--- a/src/plugins/qbsprojectmanager/qbsprofilessettingspage.h
+++ b/src/plugins/qbsprojectmanager/qbsprofilessettingspage.h
@@ -34,7 +34,7 @@ class QbsProfilesSettingsWidget;
 class QbsProfilesSettingsPage : public Core::IOptionsPage
 {
 public:
-    QbsProfilesSettingsPage(QObject *parent = nullptr);
+    QbsProfilesSettingsPage();
 
 private:
     QWidget *widget() override;
diff --git a/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp b/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
index 93bbd892b7..bc123b09c7 100644
--- a/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
+++ b/src/plugins/qbsprojectmanager/qbsprojectmanagerplugin.cpp
@@ -90,7 +90,7 @@ public:
     QbsBuildStepFactory buildStepFactory;
     QbsCleanStepFactory cleanStepFactory;
     QbsInstallStepFactory installStepFactory;
-    QbsProfilesSettingsPage profilesSetttingsPage;
+    QbsProfilesSettingsPage profilesSettingsPage;
     QbsKitAspect qbsKitAspect;
 };
 
diff --git a/src/plugins/qmljseditor/qmljseditingsettingspage.cpp b/src/plugins/qmljseditor/qmljseditingsettingspage.cpp
index 4958cfcba5..7aea17c315 100644
--- a/src/plugins/qmljseditor/qmljseditingsettingspage.cpp
+++ b/src/plugins/qmljseditor/qmljseditingsettingspage.cpp
@@ -123,8 +123,7 @@ void QmlJsEditingSettings::setAutoFormatOnlyCurrentProject(const bool autoFormat
     m_autoFormatOnlyCurrentProject = autoFormatOnlyCurrentProject;
 }
 
-QmlJsEditingSettignsPageWidget::QmlJsEditingSettignsPageWidget(QWidget *parent) :
-    QWidget(parent)
+QmlJsEditingSettignsPageWidget::QmlJsEditingSettignsPageWidget()
 {
     m_ui.setupUi(this);
 }
diff --git a/src/plugins/qmljseditor/qmljseditingsettingspage.h b/src/plugins/qmljseditor/qmljseditingsettingspage.h
index dd3010e0f2..0be399b3d5 100644
--- a/src/plugins/qmljseditor/qmljseditingsettingspage.h
+++ b/src/plugins/qmljseditor/qmljseditingsettingspage.h
@@ -82,7 +82,7 @@ class QmlJsEditingSettignsPageWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit QmlJsEditingSettignsPageWidget(QWidget *parent = nullptr);
+    QmlJsEditingSettignsPageWidget();
 
     QmlJsEditingSettings settings() const;
     void setSettings(const QmlJsEditingSettings &);
diff --git a/src/plugins/qmljstools/qmljscodestylesettingspage.cpp b/src/plugins/qmljstools/qmljscodestylesettingspage.cpp
index 2de503b782..6379ffafc4 100644
--- a/src/plugins/qmljstools/qmljscodestylesettingspage.cpp
+++ b/src/plugins/qmljstools/qmljscodestylesettingspage.cpp
@@ -121,9 +121,7 @@ void QmlJSCodeStylePreferencesWidget::updatePreview()
 
 // ------------------ CppCodeStyleSettingsPage
 
-QmlJSCodeStyleSettingsPage::QmlJSCodeStyleSettingsPage(/*QSharedPointer<CppFileSettings> &settings,*/
-                     QWidget *parent) :
-    Core::IOptionsPage(parent)
+QmlJSCodeStyleSettingsPage::QmlJSCodeStyleSettingsPage()
 {
     setId(Constants::QML_JS_CODE_STYLE_SETTINGS_ID);
     setDisplayName(QCoreApplication::translate("QmlJSTools", Constants::QML_JS_CODE_STYLE_SETTINGS_NAME));
diff --git a/src/plugins/qmljstools/qmljscodestylesettingspage.h b/src/plugins/qmljstools/qmljscodestylesettingspage.h
index c68f5a8eaf..cdafb430fc 100644
--- a/src/plugins/qmljstools/qmljscodestylesettingspage.h
+++ b/src/plugins/qmljstools/qmljscodestylesettingspage.h
@@ -71,7 +71,7 @@ class QmlJSCodeStyleSettingsPage : public Core::IOptionsPage
     Q_OBJECT
 
 public:
-    explicit QmlJSCodeStyleSettingsPage(QWidget *parent = nullptr);
+    QmlJSCodeStyleSettingsPage();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/qmlprofiler/qmlprofilerconfigwidget.cpp b/src/plugins/qmlprofiler/qmlprofilerconfigwidget.cpp
index 37994fd436..3eea277525 100644
--- a/src/plugins/qmlprofiler/qmlprofilerconfigwidget.cpp
+++ b/src/plugins/qmlprofiler/qmlprofilerconfigwidget.cpp
@@ -29,8 +29,8 @@
 namespace QmlProfiler {
 namespace Internal {
 
-QmlProfilerConfigWidget::QmlProfilerConfigWidget(QmlProfilerSettings *settings, QWidget *parent) :
-    QWidget(parent), m_ui(new Ui::QmlProfilerConfigWidget), m_settings(settings)
+QmlProfilerConfigWidget::QmlProfilerConfigWidget(QmlProfilerSettings *settings) :
+    m_ui(new Ui::QmlProfilerConfigWidget), m_settings(settings)
 {
     m_ui->setupUi(this);
     updateUi();
diff --git a/src/plugins/qmlprofiler/qmlprofilerconfigwidget.h b/src/plugins/qmlprofiler/qmlprofilerconfigwidget.h
index 63e24c64c7..cc80849f85 100644
--- a/src/plugins/qmlprofiler/qmlprofilerconfigwidget.h
+++ b/src/plugins/qmlprofiler/qmlprofilerconfigwidget.h
@@ -41,7 +41,7 @@ class QmlProfilerConfigWidget : public QWidget
     Q_OBJECT
 
 public:
-    explicit QmlProfilerConfigWidget(QmlProfilerSettings *settings, QWidget *parent = nullptr);
+    explicit QmlProfilerConfigWidget(QmlProfilerSettings *settings);
     ~QmlProfilerConfigWidget() override;
 
 private:
diff --git a/src/plugins/qnx/qnxsettingspage.cpp b/src/plugins/qnx/qnxsettingspage.cpp
index 2b488887dd..f9a8aaa53b 100644
--- a/src/plugins/qnx/qnxsettingspage.cpp
+++ b/src/plugins/qnx/qnxsettingspage.cpp
@@ -39,8 +39,7 @@
 namespace Qnx {
 namespace Internal {
 
-QnxSettingsPage::QnxSettingsPage(QObject* parent) :
-    Core::IOptionsPage(parent)
+QnxSettingsPage::QnxSettingsPage()
 {
     setId(Core::Id(Constants::QNX_SETTINGS_ID));
     setDisplayName(tr("QNX"));
diff --git a/src/plugins/qnx/qnxsettingspage.h b/src/plugins/qnx/qnxsettingspage.h
index ae7be9bb2f..c04f238d32 100644
--- a/src/plugins/qnx/qnxsettingspage.h
+++ b/src/plugins/qnx/qnxsettingspage.h
@@ -37,8 +37,10 @@ class QnxSettingsWidget;
 class QnxSettingsPage : public Core::IOptionsPage
 {
     Q_OBJECT
+
 public:
-    explicit QnxSettingsPage(QObject *parent = nullptr);
+    QnxSettingsPage();
+
     QWidget *widget() override;
     void apply() override;
     void finish() override;
diff --git a/src/plugins/qtsupport/codegensettingspage.cpp b/src/plugins/qtsupport/codegensettingspage.cpp
index 8f45c02a14..39e23e68c4 100644
--- a/src/plugins/qtsupport/codegensettingspage.cpp
+++ b/src/plugins/qtsupport/codegensettingspage.cpp
@@ -38,8 +38,7 @@ namespace Internal {
 
 // ---------- CodeGenSettingsPageWidget
 
-CodeGenSettingsPageWidget::CodeGenSettingsPageWidget(QWidget *parent) :
-        QWidget(parent)
+CodeGenSettingsPageWidget::CodeGenSettingsPageWidget()
 {
     m_ui.setupUi(this);
     connect(m_ui.includeQtModuleCheckBox, &QAbstractButton::toggled,
@@ -89,8 +88,7 @@ void CodeGenSettingsPageWidget::setUiEmbedding(int v)
 }
 
 // ---------- CodeGenSettingsPage
-CodeGenSettingsPage::CodeGenSettingsPage(QObject *parent) :
-    Core::IOptionsPage(parent)
+CodeGenSettingsPage::CodeGenSettingsPage()
 {
     m_parameters.fromSettings(Core::ICore::settings());
     setId(Constants::CODEGEN_SETTINGS_PAGE_ID);
diff --git a/src/plugins/qtsupport/codegensettingspage.h b/src/plugins/qtsupport/codegensettingspage.h
index b6987824c8..68aee7db29 100644
--- a/src/plugins/qtsupport/codegensettingspage.h
+++ b/src/plugins/qtsupport/codegensettingspage.h
@@ -40,7 +40,7 @@ class CodeGenSettingsPageWidget : public QWidget
 {
     Q_OBJECT
 public:
-    explicit CodeGenSettingsPageWidget(QWidget *parent = nullptr);
+    CodeGenSettingsPageWidget();
 
     CodeGenSettings parameters() const;
     void setParameters(const CodeGenSettings &p);
@@ -55,7 +55,7 @@ private:
 class CodeGenSettingsPage : public Core::IOptionsPage
 {
 public:
-    explicit CodeGenSettingsPage(QObject *parent = nullptr);
+    CodeGenSettingsPage();
 
     QWidget *widget() override;
     void apply() override;
diff --git a/src/plugins/todo/optionsdialog.cpp b/src/plugins/todo/optionsdialog.cpp
index 706f67cd18..d4b1860c8d 100644
--- a/src/plugins/todo/optionsdialog.cpp
+++ b/src/plugins/todo/optionsdialog.cpp
@@ -34,8 +34,7 @@
 namespace Todo {
 namespace Internal {
 
-OptionsDialog::OptionsDialog(QWidget *parent) :
-    QWidget(parent),
+OptionsDialog::OptionsDialog() :
     ui(new Ui::OptionsDialog)
 {
     ui->setupUi(this);
diff --git a/src/plugins/todo/optionsdialog.h b/src/plugins/todo/optionsdialog.h
index 716bdd5fd2..7f48ff2616 100644
--- a/src/plugins/todo/optionsdialog.h
+++ b/src/plugins/todo/optionsdialog.h
@@ -43,7 +43,7 @@ class Keyword;
 class OptionsDialog : public QWidget
 {
 public:
-    explicit OptionsDialog(QWidget *parent = nullptr);
+    OptionsDialog();
     ~OptionsDialog() override;
 
     void setSettings(const Settings &settings);