Remove links to ESGForg YouTube channel

Author: mauzey1

_includes/topbar.html

@@ -66,7 +66,7 @@
                         <a href="#" class="dropdown-toggle" data-toggle="dropdown">Users <b class="caret"></b>
                         </a>
                         <ul class="dropdown-menu">
-                            <li><a href="http://www.youtube.com/user/ESGForg">Tutorials</a></li>
+                            <li><a href="#">Tutorials</a></li>
                             <li><a href="mailing-list.html">Mailing list</a></li>
                         </ul>
                     </li>

mailing-list.md

@@ -20,7 +20,7 @@ For the developers mailing list, see the [developer info] page.)
 
 ## Other forms of contact
 
-<a href="http://www.youtube.com/channel/UCOvT7uYsE_d9jvY8TV2KTsw"><img class="contact-logo" src="media/images/youtube.png" alt="YouTube logo"/></a>
+<a href="#"><img class="contact-logo" src="media/images/youtube.png" alt="YouTube logo"/></a>
 <a href="http://twitter.com/ESGForg"><img class="contact-logo" src="media/images/twitter.png" alt="Twitter logo"/></a>
 <a href="https://plus.google.com/106699044674610308404"><img class="contact-logo" src="media/images/google+.png" alt="Google+ logo"/></a>
 <a href="http://esgf.wordpress.com/"><img class="contact-logo" src="media/images/wordpress.png" alt="Wordpress logo"/></a>