chore(tests):remove unused phantomJS workaround (#11659)

this is no longer necessary as phantomJS is not used anymore

Relates to #11489

Author: codymikol

test/angular-material-spec.js

@@ -7,27 +7,6 @@
  */
 (function() {
 
-
-  // Patch since PhantomJS does not implement click() on HTMLElement. In some
-  // cases we need to execute the native click on an element. However, jQuery's
-  // $.fn.click() does not dispatch to the native function on <a> elements, so we
-  // can't use it in our implementations: $el[0].click() to correctly dispatch.
-  // Borrowed from https://stackoverflow.com/questions/15739263/phantomjs-click-an-element
-  if (!HTMLElement.prototype.click) {
-    HTMLElement.prototype.click = function() {
-      var ev = document.createEvent('MouseEvent');
-      ev.initMouseEvent(
-        'click',
-        /*bubble*/true, /*cancelable*/true,
-        window, null,
-        0, 0, 0, 0, /*coordinates*/
-        false, false, false, false, /*modifier keys*/
-        0/*button=left*/, null
-      );
-      this.dispatchEvent(ev);
-    };
-  }
-
   var enableAnimations;
 
   beforeAll(function () {