--- a/doc-src/Ref/classical.tex Wed Dec 05 02:58:45 2001 +0100
+++ b/doc-src/Ref/classical.tex Wed Dec 05 02:59:15 2001 +0100
@@ -671,17 +671,6 @@
\end{ttbox}
deletes rules from the current claset.
-\medskip A few further functions are available as uppercase versions only:
-\begin{ttbox}
-AddXIs, AddXEs, AddXDs: thm list -> unit
-\end{ttbox}
-\indexbold{*AddXIs} \indexbold{*AddXEs} \indexbold{*AddXDs} augment the
-current claset by \emph{extra} introduction, elimination, or destruct rules.
-These provide additional hints for the basic non-automated proof methods of
-Isabelle/Isar \cite{isabelle-isar-ref}. The corresponding Isar attributes are
-``$intro?$'', ``$elim?$'', and ``$dest?$''. Note that these extra rules do
-not have any effect on classic Isabelle tactics.
-
\subsection{Accessing the current claset}
\label{sec:access-current-claset}