Qt Quick Controls contains version information from old Qt versions that are not supported anymore. It is arguably best to just drop this information.

1. Overview Documentation

The Versions section in the Overview documentation only talks about outdated Qt versions. Let's remove the section altogether.

1. API Documentation

API documentation like https://doc.qt.io/qt-6/qml-qtquick-controls-abstractbutton.html contain lots of \since information like

(since QtQuick.Controls 2.3 (Qt 5.10))

These are outdated, and should be removed.