Remove 2014 video link from docs landing page

Signed-off-by: Roger Sheen <roger@infotexture.net>

Author: infotexture

topics/dita-ot-day-2014.ditamap

@@ -117,13 +117,5 @@
         <topicref keyref="lookingunderthehoodofthe-2014"/>
       </relcell>
     </relrow>
-    <relrow>
-      <relcell>
-        <topicref keyref="intro"/>
-      </relcell>
-      <relcell>
-        <topicref keyref="overviewoftheditaopentoo-2014"/>
-      </relcell>
-    </relrow>
   </reltable>
 </map>