The removed patch is not required since switching Qt version from 5.12.11 to 5.15.2.
Upstream bug reports and fixes:
- QTBUG-62675 fixed in https://github.com/qt/qtbase/commit/b1db1dd655788fb685949959c99c901515bfd8ab since Qt 5.12.5
- QTBUG-76941 fixed in https://github.com/qt/qtbase/commit/de8bd9ec6b21e3b43b08c4c2588b5116a7ca8ece since Qt 5.12.5
Although the bugs have been fixed since Qt 5.12.5, we did need the patch due to the https://github.com/qt/qtbase/commit/1e5566c2e98098b0f7d7628f62425eec569f3a34 reversal commit which has been introduced in Qt 5.12.7.