Doc: Remove section about how to start threads

- Incomplete: It doesn't talk about how to use a raw QThread, or
  QRunnable, or Qt Concurrent.
- Redundant: Its contents are already presented in QThread's class ref,
  and the line before this section links to the "Multithreading
  Technologies in Qt" overview page which provides a more complete intro

Also remove snippet markers that are no longer used.

Change-Id: I89b7bd72f10c8ffdfd9b7772e2493050aafc9c88
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

3 files changed, 2 insertions, 8 deletions

diff --git a/examples/widgets/tutorials/threads/hellothread/hellothread.cpp b/examples/widgets/tutorials/threads/hellothread/hellothread.cpp
index 4395b0cb2b..1b5088e0db 100644
--- a/examples/widgets/tutorials/threads/hellothread/hellothread.cpp
+++ b/examples/widgets/tutorials/threads/hellothread/hellothread.cpp
@@ -44,10 +44,7 @@
  * demonstrates use of QThread, says hello in another thread and terminates
  */
 
-//! [1]
-// hellothread/hellothread.cpp
 void HelloThread::run()
 {
      qDebug() << "hello from worker thread " << thread()->currentThreadId();
 }
-//! [1]
diff --git a/examples/widgets/tutorials/threads/hellothread/hellothread.h b/examples/widgets/tutorials/threads/hellothread/hellothread.h
index c2d8ad73ee..281f2c6cb5 100644
--- a/examples/widgets/tutorials/threads/hellothread/hellothread.h
+++ b/examples/widgets/tutorials/threads/hellothread/hellothread.h
@@ -42,13 +42,12 @@
 #define HELLOTHREAD_H
 
 #include <QThread>
-//! [1]
-// hellothread/hellothread.h
+
 class HelloThread : public QThread
 {
     Q_OBJECT
 private:
     void run();
 };
-//! [1]
+
 #endif // HELLOTHREAD_H
diff --git a/examples/widgets/tutorials/threads/hellothread/main.cpp b/examples/widgets/tutorials/threads/hellothread/main.cpp
index 87660f97ee..8b4b00874f 100644
--- a/examples/widgets/tutorials/threads/hellothread/main.cpp
+++ b/examples/widgets/tutorials/threads/hellothread/main.cpp
@@ -41,7 +41,6 @@
 #include <QtCore>
 #include "hellothread.h"
 
-//! [1]
 int main(int argc, char *argv[])
 {
     QCoreApplication app(argc, argv);
@@ -51,4 +50,3 @@ int main(int argc, char *argv[])
     thread.wait();  // do not exit before the thread is completed!
     return 0;
 }
-//! [1]