Removes mailing list button (Closes #43)

Whew no mailing list button now

srctweb/_pages/home.html

@@ -21,10 +21,6 @@ jumbotron: true
     <a href="https://srct.slack.com" class="btn btn-outline-primary btn-lg"><i class="fa fa-slack" aria-hidden="true"></i> Join SRCT on Slack</a>  
   </div>
 
-  <div class="btn-group mr-4 mb-2" role="group">
-    <a href="https://lists.srct.gmu.edu/" class="btn btn-outline-primary btn-lg"><i class="fa fa-envelope" aria-hidden="true"></i> Join Our Mailing List</a>
-  </div>
-</div>
 
 <div class="row smidge">
   <legend><i class="fa fa-bullhorn fa-fw"></i>&nbsp;<strong>Mission</strong></legend>