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

[Aleix Pol Gonzalez]

apol accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R314 KJs

BRANCH
  master

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

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