Move drag and drop puzzle example to manual test

Change-Id: I859cdb2cf74cd6272c29924c77dab26b4f4c0b6c
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit cefb1c9ca9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

examples/widgets/doc/src/draganddroppuzzle.qdoc

@@ -1,18 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
-
-/*!
-    \example draganddrop/puzzle
-    \title Drag and Drop Puzzle Example
-
-    \brief The Drag and Drop Puzzle example demonstrates a way of using the drag and drop system with
-    item view widgets.
-
-    \image draganddroppuzzle-example.png
-
-    This example is an implementation of a simple jigsaw puzzle game using Qt's
-    drag and drop API.
-    The \l{Item Views Puzzle Example}{Item View Puzzle} example shows
-    many of the same features, but takes an alternative approach that uses Qt's
-    model/view framework to manage drag and drop operations.
-*/

examples/widgets/doc/src/itemviewspuzzle.qdoc

@@ -12,8 +12,4 @@
 
     This example is an implementation of a simple jigsaw puzzle game using the
     built-in support for drag and drop provided by Qt's model/view framework.
-    The \l{Drag and Drop Puzzle Example}{Drag and Drop Puzzle} example shows
-    many of the same features, but takes an alternative approach that uses Qt's
-    drag and drop API at the application level to handle drag and drop
-    operations.
 */

examples/widgets/draganddrop/CMakeLists.txt

@@ -5,4 +5,3 @@ qt_internal_add_example(draggableicons)
 qt_internal_add_example(draggabletext)
 qt_internal_add_example(dropsite)
 qt_internal_add_example(fridgemagnets)
-qt_internal_add_example(puzzle)

examples/widgets/draganddrop/draganddrop.pro

@@ -2,5 +2,4 @@ TEMPLATE    = subdirs
 SUBDIRS     = draggableicons \
               draggabletext \
               dropsite \
-              fridgemagnets \
+              fridgemagnets
-              puzzle