Clean up.

editor/js/Menubar.Add.js

@@ -1,6 +1,6 @@
 import * as THREE from 'three';
 
-import { UIPanel, UIRow, UIHorizontalRule } from './libs/ui.js';
+import { UIPanel, UIRow } from './libs/ui.js';
 
 import { AddObjectCommand } from './commands/AddObjectCommand.js';
 

editor/js/Menubar.File.js

@@ -1,5 +1,4 @@
 import { UIPanel, UIRow, UIHorizontalRule } from './libs/ui.js';
-import { Loader } from './Loader.js';
 
 function MenubarFile( editor ) {