Remove rules related to generating m4/jm-glibc-io.m4.

Makefile.cfg

@@ -27,28 +27,3 @@ cvs_files = \
 #  $(srcdir)/src/ansi2knr.c
 
 local_updates = wget-update cvs-update
-
-###############################################
-
-# FIXME: CAUTION this list is a duplicate of one in lib/Makefile.am.
-io_functions = \
-  clearerr feof ferror fflush fgets fputc fputs \
-  fread fwrite getc getchar putc putchar
-unlocked_io_functions = $(patsubst %,%_unlocked,$(io_functions))
-
-comma_separated = $(shell echo $(unlocked_io_functions)|tr -s ' ' ,)
-
-# This temp file may not be e.g., $@t, since that may be in a read-only
-# directory.  Instead, use a file in the current directory.
-t_io = $(notdir $@)t
-
-# This rule requires GNU make.
-$(srcdir)/m4/jm-glibc-io.m4: $(srcdir)/m4/jm-glibc-io.m4n Makefile.cfg
-	echo dnl This file is automatically generated from $(notdir $<). \
-	  > $(t_io)
-	echo >> $(t_io)
-	sed							\
-	  -e 's/@space_separated@/$(unlocked_io_functions)/g'	\
-	  -e 's/@comma_separated@/$(comma_separated)/g'		\
-	  $< >> $(t_io)
-	mv $(t_io) $@