Remove jsdares from real-world use list again

Author: marijnh

doc/realworld.html

@@ -46,7 +46,6 @@ <h1><span class="logo-braces">{ }</span> <a href="http://codemirror.net/">CodeMi
       <li><a href="http://icecoder.net">ICEcoder</a> (web IDE)</li>
       <li><a href="http://extensions.joomla.org/extensions/edition/editors/8723">Joomla plugin</a></li>
       <li><a href="http://jsbin.com">jsbin.com</a> (JS playground)</li>
-      <li><a href="http://www.jsdares.com/">jsdares</a> (interactive learning)</li>
       <li><a href="http://www.jshint.com/">JSHint</a> (JS linter)</li>
       <li><a href="http://kl1p.com/cmtest/1">kl1p</a> (paste service)</li>
       <li><a href="http://www.chris-granger.com/2012/04/12/light-table---a-new-ide-concept/">Light Table</a> (experimental IDE)</li>