Remove perl careers from the sponsor page

this business no longer exists

Author: oalders

root/about/sponsors.tx

@@ -477,18 +477,6 @@ money...
           </p>
         </td>
       </tr>
-      <tr>
-        <td>
-          <a target="_blank" rel="noopener nofollow" href="https://perl.careers/">
-            <img src="/static/images/sponsors/perl-careers.png" width="180">
-          </a>
-        </td>
-        <td>
-          <p>
-            Find Perl Jobs and Perl Developers with Perl Careers.
-          </p>
-        </td>
-      </tr>
       <tr>
         <td>
           <a target="_blank" rel="noopener nofollow" href="https://www.servercentral.com/">