Migration code will be removed in qt6 + AA_UseHighDpiPixmaps is enabled by default in qt6

src/main.cpp

@@ -21,7 +21,9 @@
 int main(int argc, char **argv)
 {
     // Fixes blurry icons with fractional scaling
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
+#endif
     QApplication application(argc, argv);
     Kdelibs4ConfigMigrator migrate(QStringLiteral("kreversi"));
     migrate.setConfigFiles(QStringList() << QStringLiteral("kreversirc"));