Completely remove chat room link

(It never gathered the mass needed to be useful.)

Author: marijnh

html/index.html

@@ -122,7 +122,6 @@ <h2>Other pages</h2>
     <li><a href="Eloquent_JavaScript.pdf">This book as a single PDF file</a> (&amp; <a href="Eloquent_JavaScript_small.pdf">small version for mobile</a>)</li>
     <li><a href="https://eloquentjavascript.net/Eloquent_JavaScript.epub">This book as an EPUB file</a></li>
     <li><a href="https://eloquentjavascript.net/Eloquent_JavaScript.mobi">This book as a MOBI (Kindle) file</a></li>
-    <!-- <li><a href="https://gitter.im/Eloquent-JavaScript/Lobby">Community chat for readers</a></li> -->
     <li><a href="https://eloquentjavascript.net/1st_edition">The first edition of the book</a></li>
     <li><a href="https://eloquentjavascript.net/2nd_edition">The second edition of the book</a></li>
   </ul>