Revert changes to how video_alpha is stubbed out for testing.

lms/templates/videoalpha.html

@@ -3,22 +3,7 @@
 % endif
 
 %if settings.MITX_FEATURES['STUB_VIDEO_FOR_TESTING']:
-  <div id="stub_out_video_for_testing">
-    <div class="video" data-autoplay="${settings.MITX_FEATURES['AUTOPLAY_VIDEOS']}">
-      <div class="slider"></div>
-      <div>
-        <ul class="vcr">
-          <li><a class="video_control" href="#"></a></li>
-          <li>
-            <div class="vidtime">0:00 / 0:00</div>
-          </li>
-        </ul>
-        <div class="secondary-controls">
-          <a href="#" class="add-fullscreen" title="Fill browser">Fill Browser</a>
-        </div>
-      </div>
-    </div>
-  </div>
+  <div id="stub_out_video_for_testing"></div>
 %else:
   <div
       id="video_${id}"