Revert "Add a ltnews entry"

This reverts commit e148554.

base/doc/ltnews40.tex

@@ -384,28 +384,19 @@ \section{Improvement to \XeTeX\ \cs{showhyphens}}
 \githubissue{1380}
 
 
-\section{Passing template keys using \cs{KeyValue}}
-
-With the move of the template code to the kernel, some internal efficiencies
-were also made. However, there was an oversight in how passing key values from
-one setting to another was implemented, meaning that using \cs{KeyValue} could
-result in an infinite loop. This has now been fixed.
+\section{Avoid code duplication in rollback}
+
+When the kernel uses \cs{AddToHook} in a region that might be 
+rolled back (which happens in a few places) and a document requests a
+rollback, then we have the situation that the hook already contains code to which we added the same
+(or slightly different) code during the
+rollback; this results in code duplication or, worse, in errors. This has
+now been corrected by dropping any such code chunk (if there is one) prior to
+adding the rollback code.
 %
-\githubissue{1487}
-
+\githubissue{1407}
 
 
-\subsection{Handling of global keys with spaces}
-
-If the global (class) options contained spaces around key names,
-\cs{ProcessKeyOptions} would fail to remove known keys from the
-list of unused global options and \cs{OptionNotUsed} would mistakenly
-add space-surrounded key names to that list.
-These has been corrected as a hotfix in patch level 1 of the November 2023
-release (but unfortunately not mentioned in~\cite{40:ltnews38}) and
-the current release, respectively.
-%
-\githubissue{1238}
 
 
 \section{Changes to packages in the \pkg{amsmath} category}