In 36d12783 in qtbase the graphics view examples were added to
the qtwidgets-examples.qdoc, but they were not removed from the
qtdoc repo, so they show up twice in the list with different
layouts.

Change-Id: I5c28959f5306f114ee5be60b80478e7ae151f943
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>