refactor: remove secr IPR admin link (ietf-tools#6540)

Author: rpcross

ietf/secr/templates/main.html

@@ -31,12 +31,7 @@ <h2>Meetings and Proceedings</h2>
                         <li> <a href="{% url "ietf.secr.meetings.views.main" %}"><b>Meeting Manager</b></a></li>
                         </ul>
                     </td>
-                    <td>
-                        <h2>IPR</h2>
-                        <ul>
-                        <li> <a href="{% url 'ietf.ipr.views.admin' state='pending' %}"><b>IPR Admin</b></a></li>
-                        </ul>
-                    </td>
+                    <td></td>
                 </tr>
                 </tbody>
             </table>