Removed reference to ni module.

Doc/lib/libfuncs.tex

@@ -12,12 +12,11 @@ This function is invoked by the \keyword{import} statement.  It
 mainly exists so that you can replace it with another
 function that has a compatible interface, in order to change the
 semantics of the \keyword{import} statement.  For examples of why and
-how you would do this, see the standard library modules \module{ni},
+how you would do this, see the standard library modules
 \module{ihooks} and \module{rexec}.  See also the built-in module
 \module{imp}, which defines some useful operations out of which you can
 build your own \function{__import__()} function.
 \stindex{import}
-\refstmodindex{ni}
 \refstmodindex{ihooks}
 \refstmodindex{rexec}
 \refbimodindex{imp}

Doc/libfuncs.tex

@@ -12,12 +12,11 @@ This function is invoked by the \keyword{import} statement.  It
 mainly exists so that you can replace it with another
 function that has a compatible interface, in order to change the
 semantics of the \keyword{import} statement.  For examples of why and
-how you would do this, see the standard library modules \module{ni},
+how you would do this, see the standard library modules
 \module{ihooks} and \module{rexec}.  See also the built-in module
 \module{imp}, which defines some useful operations out of which you can
 build your own \function{__import__()} function.
 \stindex{import}
-\refstmodindex{ni}
 \refstmodindex{ihooks}
 \refstmodindex{rexec}
 \refbimodindex{imp}