Remove duplicate macro doc.

Regenerate docs.
Fixes #7071.

[SVN r79376]

doc/html/index.html

@@ -951,7 +951,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: April 22, 2012 at 10:30:25 GMT</small></p></td>
+<td align="left"><p><small>Last revised: July 09, 2012 at 11:13:25 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>