Do not update screen edges when compositing settings changes

The comment says it all: update all settings which can be done through
the compositing KCM. Years ago screen edges was in the composite KCM, but
it no longer is. So there is no need to update the edges when the
compositing settings changes.

composite.cpp

@@ -361,10 +361,6 @@ void Compositor::slotReinitialize()
         return;
     }
 
-    // Update any settings that can be set in the compositing kcm.
-#ifdef KWIN_BUILD_SCREENEDGES
-    Workspace::self()->screenEdge()->update();
-#endif
     // Restart compositing
     finish();
     // resume compositing if suspended