Removed HTML artifact from index page

Change-Id: Ibeef033ea2051a91056e53774345c48697f73a39

Author: Alexander Lucas

docs/html/training/accessibility/index.jd

@@ -13,7 +13,6 @@ next.link=accessible-app.html
 <h2>Dependencies and prerequisites</h2>
 <ul>
   <li>Android 2.0 (API Level 5) or higher</li>
-Playback</a></li>
 </ul>
 
 <h2>You should also read</h2>