Removed obsolete functions from the reference.

[SVN r13474]

doc/reference/repeat_3rd.htm

@@ -30,10 +30,6 @@
  <p>Same as <a href="repeat.htm#BOOST_PP_REPEAT">BOOST_PP_REPEAT</a>(), but implemented independently.</p> 
 <hr>
 
-<h2><a name="BOOST_PREPROCESSOR_REPEAT_3RD">#define BOOST_PREPROCESSOR_REPEAT_3RD</a>(N,M,P)</h2>
- <p>Obsolete. Use <a href="repeat_3rd.htm#BOOST_PP_REPEAT_3RD">BOOST_PP_REPEAT_3RD</a>().</p> 
-<hr>
-
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