Change paintedwindow example to be a manual test

Pick-to: 6.5
Change-Id: I25a0f491f824c43fc75ba6358518133ede09adcd
Reviewed-by: Christian Strømme <christian.stromme@qt.io>

examples/opengl/CMakeLists.txt

@@ -1,7 +1,6 @@
 # Copyright (C) 2022 The Qt Company Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 
-qt_internal_add_example(paintedwindow)
 qt_internal_add_example(openglwindow)
 if(TARGET Qt6::Widgets)
     qt_internal_add_example(contextinfo)

examples/opengl/opengl.pro

@@ -1,7 +1,6 @@
 TEMPLATE      = subdirs
 
-SUBDIRS = paintedwindow \
-          openglwindow
+SUBDIRS = openglwindow
 
 qtHaveModule(widgets) {
     SUBDIRS += contextinfo \