Revert "devel/py-qt5-pyqt: mark DEPRECATED"

This reverts commit ccfab50ca9f05c3e7f61c3c3dd45f99a6b205cc9.

devel/py-qt5-pyqt is not going anywhere for the time being. @kde will
remove support for www/qt5-webkit from this port on or before its
EXPIRATION_DATE arrives. The WebKit module is easily disabled and there
are very few ports that rely on it. Maintainers have been notified.