MD Settings: Remove unnecessary importHtml() calls in site-settings tests.

chrome/test/data/webui/settings/category_setting_exceptions_tests.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** @fileoverview Suite of tests for category-setting-exceptions. */
 cr.define('category_setting_exceptions', function() {
   function registerTests() {
     suite('CategorySettingExceptions', function() {
       /**
        * A site settings exceptions created before each test.
        * @type {SiteSettingsExceptionsElement}
        */
       var testElement;
 
-      // Import necessary html before running suite.
-      suiteSetup(function() {
-        return PolymerTest.importHtml(
-           'chrome://md-settings/site_settings/category_setting_exceptions.html'
-           );
-      });
-
       // Initialize a category-setting-exceptions before each test.
       setup(function() {
         browserProxy = new TestSiteSettingsPrefsBrowserProxy();
         settings.SiteSettingsPrefsBrowserProxyImpl.instance_ = browserProxy;
         PolymerTest.clearBody();
         testElement = document.createElement('category-setting-exceptions');
         document.body.appendChild(testElement);
       });
 
       test('create category-setting-exceptions', function() {
         // The category-setting-exceptions is mainly a container for site-lists.
         // There's not much that merits testing.
         assertTrue(!!testElement);
       });
     });
   }
 
   return {
     registerTests: registerTests,
   };
 });