Document that apply() is deprecated. See:

freddrake · freddrake · commit 45e482fd3d7e · 2003-01-02T04:54:04.000Z
http://mail.python.org/pipermail/python-dev/2003-January/031556.html
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
@@ -75,6 +75,9 @@ \section{Built-in Functions \label{built-in-funcs}}
   to \code{\var{function}(*\var{args}, **\var{keywords})}.
   Use of \function{apply()} is not necessary since the ``extended call
   syntax,'' as used in the last example, is completely equivalent.
+
+  \deprecated{2.3}{Use the extended call syntax instead, as described
+                   above.}
 \end{funcdesc}
 
 \begin{funcdesc}{bool}{x}
