Remove stale reference to libIndex.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132757 91177308-0d34-0410-b5e6-96231b3b80d8

www/features.html

@@ -232,7 +232,6 @@ Currently, clang is divided into the following libraries and tool:
 <li><b>librewrite</b> - Editing of text buffers (important for code rewriting
     transformation, like refactoring).</li>
 <li><b>libanalysis</b> - Static analysis support.</li>
-<li><b><a href="docs/libIndex.html">libindex</a></b> - Cross-translation-unit infrastructure and indexing support.</li>
 <li><b>clang</b> - A driver program, client of the libraries at various
     levels.</li>
 </ul>