[CSS2] Removed a broken link.

Author: bert-github

css2/about.src

@@ -40,8 +40,8 @@ particular XML language, or <em>only</em> for HTML).
 <li>Removing CSS2 features that will be obsoleted by CSS3, thus
 encouraging adoption of the proposed CSS3 features in their place.
 
-<li>Adding a (very) small number of <a href="changes.html#new">new
-property values,</a> when implementation experience has shown that
+<li>Adding a (very) small number of new
+property values, when implementation experience has shown that
 they are needed for implementing CSS2.
 </ul>