Remove the "Set all to not on agenda" button, as it is never used.

 - Legacy-Id: 5524

Author: JoelHalpern

ietf/templates/iesg/agenda_documents_redesign.html

@@ -67,7 +67,6 @@ <h1>Documents on Future IESG Telechat Agendas</h1>
 <form action="" method="POST">
 {% if user|in_group:"Secretariat" %}
 <div class="secretariat-actions">
-<button id="clear-all-on-schedule">Set all to not on agenda</button>
 <input type="submit" value="Save"/>
 </div>
 {% endif %}