Remove enlightened perl from the sponsor page

this organisation no longer exists.

Author: oalders

root/about/sponsors.tx

@@ -557,21 +557,6 @@ money...
           </p>
         </td>
       </tr>
-      <tr>
-        <td>
-          <a target="_blank" rel="noopener nofollow" href="https://www.enlightenedperl.org/">
-            <img src="/static/images/sponsors/epo.png">
-          </a>
-        </td>
-        <td>
-          <p>
-            <a target="_blank" rel="noopener nofollow"
-            href="https://www.enlightenedperl.org/">Enlightened Perl
-            Organisation</a> kindly sponsored our logo competition. It's a
-            nice logo, isn't it?
-          </p>
-        </td>
-      </tr>
       <tr>
         <td>
           <a target="_blank" rel="noopener nofollow" href="http://www.perlfoundation.org/">