__rcmp__() description: Changed to indicate that this is no longer

                         supported as of Python 2.1.  We still need to
                         have an entry for this since it is reasonable
                         for users to want to understand existing code.

This closes SF bug #122715.

Doc/ref/ref3.tex

@@ -955,14 +955,7 @@ instances are compared by object identity (``address'').
 \end{methoddesc}
 
 \begin{methoddesc}[object]{__rcmp__}{self, other}
-Called by all comparison operations.  Should return a negative integer if
-\code{self < other}, zero if \code{self == other}, a positive integer if
-\code{self > other}.  If no \method{__cmp__()} operation is defined, class
-instances are compared by object identity (``address'').
-(Note: the restriction that exceptions are not propagated by
-\method{__cmp__()} has been removed in Python 1.5.)
-\bifuncindex{cmp}
-\index{comparisons}
+  \versionchanged[No longer supported]{2.1}
 \end{methoddesc}
 
 \begin{methoddesc}[object]{__hash__}{self}