Doc: Clean up threading examples

- Example 3 (Clock) is a collection of anti-patterns.
    - It implements a slot in a QThread subclass and then forces the new
      thread to use Qt::DirectConnection to invoke the slot in the
      "wrong" thread.
    - It talks about getting away with non-thread-safe usage
    - It uses a thread as a timer and then admits that it's an over-
      complicated approach.
- Example 4 (Permanent Thread) is over-complicated yet incomplete. A
  better one exists in the QThread class ref.
- Example 1 (Thread Pool) is covered by the QThreadPool class ref.
- Example 2 (QtConcurrent::run()) is covered in the "Threading and
  Concurrent Programming Examples" page and the "QtConcurrentRun" page.
- The undocumented "Hello Thread" example is covered in the QThread
  class ref.
- These examples cannot be accessed from Qt Creator's Examples tool.
- These examples are neither widget-related nor tutorials, contrary to
  their source paths.

Task-number: QTBUG-33360
Change-Id: Ic79cb764ee925ddbcbeafee8e1d01db7fe0f6cfe
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/examples/widgets/tutorials/threads/clock/clock.pro b/examples/widgets/tutorials/threads/clock/clock.pro
deleted file mode 100644
index 041c02bea8..0000000000
--- a/examples/widgets/tutorials/threads/clock/clock.pro
+++ /dev/null
@@ -1,10 +0,0 @@
-QT += widgets
-CONFIG += console
-TEMPLATE = app
-SOURCES += main.cpp \
-    clockthread.cpp
-HEADERS += clockthread.h
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/clock
-INSTALLS += target