Remove values that are set by default on parent class.

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/Views/MaterialGraphView.cs

     {
         public MaterialGraphView()
         {
-            focusIndex = 0;
-
             RegisterCallback<MouseUpEvent>(DoContextMenu, Capture.Capture);
             SetupZoom(ContentZoomer.DefaultMinScale, ContentZoomer.DefaultMaxScale);
             this.AddManipulator(new ContentDragger());
             canPasteSerializedData = CanPasteSerializedDataImplementation;
             unserializeAndPaste = UnserializeAndPasteImplementation;
             deleteSelection = DeleteSelectionImplementation;
-
-            isReframable = true;
         }
 
         public bool CanAddToNodeMenu(Type type)