Enable (un)map notify event filtering in Unmanaged

The specific methods are dropped as UnmapNotify event is not used at all
and just delegates to another method and map notify was noop.

events.cpp

@@ -1524,14 +1524,14 @@ bool Unmanaged::windowEvent(xcb_generic_event_t *e)
             emit opacityChanged(this, old_opacity);
         }
     }
-    switch(e->type) {
+#endif
-    case UnmapNotify:
+    const uint8_t eventType = e->response_type & ~0x80;
+    switch (eventType) {
+    case XCB_UNMAP_NOTIFY:
         workspace()->updateFocusMousePosition(Cursor::pos());
-        unmapNotifyEvent(&e->xunmap);
+        release();
-        break;
-    case MapNotify:
-        mapNotifyEvent(&e->xmap);
         break;
+#if KWIN_QT5_PORTING
     case ConfigureNotify:
         configureNotifyEvent(&e->xconfigure);
         break;
@@ -1549,20 +1549,11 @@ bool Unmanaged::windowEvent(xcb_generic_event_t *e)
             damageNotifyEvent();
         break;
     }
-    }
 #endif
+    }
     return false; // don't eat events, even our own unmanaged widgets are tracked
 }
 
-void Unmanaged::mapNotifyEvent(XMapEvent*)
-{
-}
-
-void Unmanaged::unmapNotifyEvent(XUnmapEvent*)
-{
-    release();
-}
-
 void Unmanaged::configureNotifyEvent(XConfigureEvent* e)
 {
     if (effects)

unmanaged.h

@@ -53,8 +53,6 @@ protected:
 private:
     virtual ~Unmanaged(); // use release()
     // handlers for X11 events
-    void mapNotifyEvent(XMapEvent* e);
-    void unmapNotifyEvent(XUnmapEvent*e);
     void configureNotifyEvent(XConfigureEvent* e);
 };