Doc: Exclude Qt Quick Dialogs examples in qtquick.qdocconf file

Qt Quick Dialogs has its own .qdocconf file where the example path
is defined. This change removes the path from .qdocconf for Qt Quick
module so qdoc doesn't try to parse it twice.

Change-Id: I06ad6895d5929031c37e21bfa91a813ba60d86d2
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Fix compiler warning about unused parameter

Fix gcc compiler warning about unused parameter:

qquickwindow.cpp:111:10: warning: unused parameter ‘e’ [-Wunused-parameter]

This got introduced by commit 9d75626b

Change-Id: Ia280fd9fdd584eed81f4d810311c56f5daee3e28
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>