Revert commit 6bbae4f85b ("kde: apply Qt theme on non-KDE systems and add Qt6 support (#367)") due to unexpected issues. Follow-up work is tracked in https://github.com/danth/stylix/issues/489. Closes: https://github.com/danth/stylix/issues/480 Closes: https://github.com/danth/stylix/issues/485 Closes: https://github.com/danth/stylix/issues/487
6bbae4f85b