MD Settings: Remove remaining importHtml() calls from site settings tests.

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

Index: chrome/test/data/webui/settings/site_details_tests.js
diff --git a/chrome/test/data/webui/settings/site_details_tests.js b/chrome/test/data/webui/settings/site_details_tests.js
index a4e83b2c0ae5f6b16c3c6cca517cc92b5c54a402..278a8604052a1d98f5365839f533334699dbbe64 100644
--- a/chrome/test/data/webui/settings/site_details_tests.js
+++ b/chrome/test/data/webui/settings/site_details_tests.js
@@ -108,13 +108,6 @@ cr.define('site_details', function() {
         }
       };
 
-      // Import necessary html before running suite.
-      suiteSetup(function() {
-        return PolymerTest.importHtml(
-            'chrome://md-settings/site_settings/site_details.html'
-            );
-      });
-
       // Initialize a site-details before each test.
       setup(function() {
         browserProxy = new TestSiteSettingsPrefsBrowserProxy();