D20907: Disable broken and no longer needed workaround code with msvc2019

[Hannah von Reth]

vonreth edited the summary of this revision.

REPOSITORY
  R314 KJs

REVISION DETAIL
  https://phabricator.kde.org/D20907

To: vonreth, dfaure, arichardson
Cc: kde-frameworks-devel, michaelh, ngraham, bruns