Remove obsolete lines like this:

\setindexsubitem{(in module frobnitz)}

These are no longer needed when present before any other \setindexsubitem{}
in the module section.  The indexsubitem is now set by \bimodindex and
\stmodindex.

Doc/lib/libpwd.tex

@@ -19,7 +19,6 @@ A \code{KeyError} exception is raised if the entry asked for cannot be found.
 
 It defines the following items:
 
-\setindexsubitem{(in module pwd)}
 \begin{funcdesc}{getpwuid}{uid}
 Return the password database entry for the given numeric user ID.
 \end{funcdesc}