Removed tooltip from captions. [BLD-629]

CHANGELOG.rst

@@ -5,6 +5,8 @@ These are notable changes in edx-platform.  This is a rolling list of changes,
 in roughly chronological order, most recent first.  Add your entries at or near
 the top.  Include a label indicating the component affected.
 
+Blades: Removed tooltip from captions. BLD-629.
+
 Blades: Fix problem with loading YouTube API is it is not available. BLD-531.
 
 Blades: Fix download subs for non youtube videos and non-en language. BLD-897.

lms/templates/video.html

@@ -96,7 +96,7 @@
           <a class="nav-skip sr" id="before-transcript_${id}" href="#after-transcript_${id}">${_('Skip to end of transcript.')}</a>
       </article>
 
-      <ol id="transcript-captions" class="subtitles" tabindex="0" title="${_('Captions')}" role="group" aria-label="${_('Activating an item in this group will spool the video to the corresponding time point. To skip transcript, go to previous item.')}">
+      <ol id="transcript-captions" class="subtitles" tabindex="0" role="group" aria-label="${_('Activating an item in this group will spool the video to the corresponding time point. To skip transcript, go to previous item.')}">
         <li></li>
       </ol>
     </div>