Revert "Merge pull request #315 from txtsd/display_scaling"

This reverts commit fcf728f3b5.

launcher/main.cpp

@@ -27,10 +27,6 @@ int main(int argc, char *argv[])
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
-    QApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
-#endif
-
     // initialize Qt
     Application app(argc, argv);