Fix qunit interface

Remove extraneous qunit-fixture until ember-qunit gets major version bump

Author: SergeAstapov

tests/index.html

@@ -21,13 +21,6 @@
     {{content-for "body"}}
     {{content-for "test-body"}}
 
-    <div id="qunit"></div>
-    <div id="qunit-fixture">
-      <div id="ember-testing-container">
-        <div id="ember-testing"></div>
-      </div>
-    </div>
-
     <script src="/testem.js" integrity=""></script>
     <script src="{{rootURL}}assets/vendor.js"></script>
     <script src="{{rootURL}}assets/test-support.js"></script>