More tweaks for python 3

tailbone/templates/batch/view.mako

@@ -39,13 +39,6 @@
   </style>
 </%def>
 
-<%def name="context_menu_items()">
-  ${parent.context_menu_items()}
-  % if master.cloneable and request.has_perm('{}.clone'.format(permission_prefix)):
-      <li>${h.link_to("Clone as new batch", url('{}.clone'.format(route_prefix), uuid=batch.uuid))}</li>
-  % endif
-</%def>
-
 <%def name="buttons()">
     <div class="buttons">
       ${self.leading_buttons()}