2f6fe3a268 has made calls to
QApplicationPrivate::setActiveWindow() redundant.
Remove redundant calls.
Task-number: QTBUG-121488
Change-Id: I7bd841574c07d73416f9f63d564fe31a8475fa9e
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>