Documentation: exclude @pxref{[REMOTES]} from texinfo intermediate output

We already had a hack to exclude @pxref{[URLS]} from the texi stream that
refers to nonexistent anchor.

This allows "make info" to produce gitman.info again.
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/cat-texi.perl

@@ -11,7 +11,7 @@
 	if (s/^\@top (.*)/\@node $1,,,Top/) {
 		push @menu, $1;
 	}
-	s/\(\@pxref{\[URLS\]}\)//;
+	s/\(\@pxref{\[(URLS|REMOTES)\]}\)//;
 	print TMP;
 }
 close TMP;