Removed obsolete functions from the reference.

[SVN r13474]

doc/reference/logical_or.htm

@@ -41,10 +41,6 @@ in the range [0, <a href="limits.htm#BOOST_PP_LIMIT_MAG">BOOST_PP_LIMIT_MAG</a>]
 
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-<h2><a name="BOOST_PREPROCESSOR_OR">#define BOOST_PREPROCESSOR_OR</a>(X,Y)</h2>
- <p>Obsolete. Use <a href="logical_or.htm#BOOST_PP_OR">BOOST_PP_OR</a>().</p> 
-<hr>
-
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