Remove static footer content

This content is injected by an AJAX call to the server.

Ref: readthedocs/readthedocs-corporate#208

Author: humitos

sphinx_rtd_theme/versions.html

@@ -7,30 +7,7 @@
       <span class="fa fa-caret-down"></span>
     </span>
     <div class="rst-other-versions">
-      <dl>
-        <dt>{{ _('Versions') }}</dt>
-        {% for slug, url in versions %}
-          <dd><a href="{{ url }}">{{ slug }}</a></dd>
-        {% endfor %}
-      </dl>
-      <dl>
-        <dt>{{ _('Downloads') }}</dt>
-        {% for type, url in downloads %}
-          <dd><a href="{{ url }}">{{ type }}</a></dd>
-        {% endfor %}
-      </dl>
-      <dl>
-        <dt>{{ _('On Read the Docs') }}</dt>
-          <dd>
-            <a href="//{{ PRODUCTION_DOMAIN }}/projects/{{ slug }}/?fromdocs={{ slug }}">{{ _('Project Home') }}</a>
-          </dd>
-          <dd>
-            <a href="//{{ PRODUCTION_DOMAIN }}/builds/{{ slug }}/?fromdocs={{ slug }}">{{ _('Builds') }}</a>
-          </dd>
-      </dl>
-      <hr/>
-      {% trans %}Free document hosting provided by <a href="http://www.readthedocs.org">Read the Docs</a>.{% endtrans %}
-
+      {# This content is injected by an AJAX call to readthedocs.org/readthedocs.com #}
     </div>
   </div>
 {% endif %}