Remove not implemented method

src/server/display.h

@@ -177,7 +177,6 @@ public:
     OutputManagementInterface *createOutputManagement(QObject *parent = nullptr);
     PlasmaShellInterface *createPlasmaShell(QObject *parent = nullptr);
     PlasmaWindowManagementInterface *createPlasmaWindowManagement(QObject *parent = nullptr);
-    QtSurfaceExtensionInterface *createQtSurfaceExtension(QObject *parent = nullptr);
     IdleInterface *createIdle(QObject *parent = nullptr);
     FakeInputInterface *createFakeInput(QObject *parent = nullptr);
     ShadowManagerInterface *createShadowManager(QObject *parent = nullptr);

tests/touchclienttest.h

@@ -38,7 +38,6 @@ private:
     void render(const QSize &size);
     void render();
     void setupRegistry(KWayland::Client::Registry *registry);
-    void toggleTimer();
     QThread *m_connectionThread;
     KWayland::Client::ConnectionThread *m_connectionThreadObject;
     KWayland::Client::EventQueue *m_eventQueue;