Remove override decorator

[signedav]

Apparently this leaded to issues. Not sure why. Seems older QGIS had the problem.

Fixes #945 and fixes #947

[signedav]

@gacarrillor I will be happy to revert this commit in future, but we need to clarify why it causes problems.

Btw. reproducable on 3.28 QGIS of this docker:

docker run \
  --rm \
  -i \
  -t \
  -e DISPLAY=unix$DISPLAY \
  -e TZ='Europe/Paris' \
  -v /tmp/.X11-unix:/tmp/.X11-unix \
  qgis/qgis:release-3_22 qgis

(first I need to turn off xhost -)