Editorial: remove domain to Unicode reference

Made obsolete by #2689.

Author: annevk

source

@@ -2574,7 +2574,6 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><dfn data-x-href="https://url.spec.whatwg.org/#percent-decode">Percent decode</dfn></li>
      <li><dfn data-x-href="https://url.spec.whatwg.org/#set-the-username">set the username</dfn></li>
      <li><dfn data-x-href="https://url.spec.whatwg.org/#set-the-password">set the password</dfn></li>
-     <li>The <dfn data-x-href="https://url.spec.whatwg.org/#concept-domain-to-unicode">domain to Unicode</dfn> algorithm</li>
      <li>The <dfn data-x-href="https://url.spec.whatwg.org/#concept-urlencoded"><code>application/x-www-form-urlencoded</code></dfn> format</li>
      <li>The <dfn data-x-href="https://url.spec.whatwg.org/#concept-urlencoded-serializer"><code>application/x-www-form-urlencoded</code> serializer</dfn></li>
     </ul>