Kdelibs4ConfigMigrator was removed in qt6

src/main.cpp

@@ -16,7 +16,9 @@
 #include <KLocalizedString>
 
 #include <KgDifficulty>
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <kdelibs4configmigrator.h>
+#endif
 #include <QApplication>
 #include <QCommandLineParser>
 #include <QStandardPaths>
@@ -29,10 +31,12 @@ int main(int argc, char **argv)
     QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 #endif
     QApplication app(argc, argv);
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     Kdelibs4ConfigMigrator migrate(QStringLiteral("kdiamond"));
     migrate.setConfigFiles(QStringList() << QStringLiteral("kdiamondrc") << QStringLiteral("kdiamond.notifyrc"));
     migrate.setUiFiles(QStringList() << QStringLiteral("kdiamondui.rc"));
     migrate.migrate();
+#endif
 
     KLocalizedString::setApplicationDomain("kdiamond");
     KAboutData about(QStringLiteral("kdiamond"), i18nc("The application's name", "KDiamond"),