FIXES #86 Get rid of Google+ since its dead

Author: gannebamm

_includes/footer.html

@@ -13,7 +13,6 @@
           <div class="pull-right social">
             <a href="http://github.com/geonode/" target="_blank" alt="GitHub"><i class="fa fa-github-alt"></i></a>
             <a href="https://twitter.com/GeoNode" class="tw" target="_blank" alt="Twitter"><i class="fa fa-twitter"></i></a>
-            <a href="https://plus.google.com/u/1/b/100587124776656797019/" class="gp" target="_blank" alt="Google+"><i class="fa fa-google-plus"></i></a>
           </div>
         </div>
       </div>