P5-1922 fix jslint warnings

src/3dHandler.js

@@ -1,10 +1,9 @@
 'use strict';
-
-var util = require('./util');
+/* globals fabric */
 
 /**
  * Handles 3d image of canvas products.
- * @param {canvas}
+ * @param {canvas} canvas
  */
 function ThreeDHandler(canvas) {
     var _overlay = new fabric.Group();