Code cleanup

Runtime/editor/editor_window.cs

 using System;
 using System.Collections.Generic;
 using Unity.UIWidgets.async;
-using Unity.UIWidgets.engine;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.rendering;
 using Unity.UIWidgets.scheduler;
             if (regenerateLayerTree) {
                 this._regenerateLayerTree = true;
             }
+
             doSpeedUp();
             doCoolDown();
         }
                 this._binding.renderView?.visitChildren(visitor);
             }
         }
-         
+
-        
-         static void doSpeedUp() {
+
+        static void doSpeedUp() {
             onFrameRateSpeedUp();
         }