Remove non-existing tag - liaison search form doesn't have a sort field

 - Legacy-Id: 10329

Author: OleLaursen

ietf/templates/liaisons/search_form.html

@@ -15,8 +15,6 @@
     </span>
   </div> <!-- search_field -->
 
-  {{ form.sort }} {# hidden field #}
-
   <div class="panel-group" id="accordion1">
     <div class="panel panel-default">
       <div class="panel-heading">