We depend against kf5.91

src/dolphinmainwindow.cpp

@@ -64,7 +64,6 @@
 #include <KUrlNavigator>
 #include <KWindowSystem>
 #include <KXMLGUIFactory>
-#include <kxmlgui_version.h>
 
 #include <kio_version.h>
 
@@ -123,9 +122,7 @@ DolphinMainWindow::DolphinMainWindow() :
     setComponentName(QStringLiteral("dolphin"), QGuiApplication::applicationDisplayName());
     setObjectName(QStringLiteral("Dolphin#"));
 
-#if KXMLGUI_VERSION >= QT_VERSION_CHECK(5, 88, 0)
     setStateConfigGroup("State");
-#endif
 
     connect(&DolphinNewFileMenuObserver::instance(), &DolphinNewFileMenuObserver::errorMessage,
             this, &DolphinMainWindow::showErrorMessage);