binutils: Remove unused substitution PROGRAM

Unlike other substitution, this substitution of @program@ was done in
binutils/Makefile and it was intended for binutils/cxxfilt.man.  @program@
in binutils/cxxfilt.man is removed in the commit 0285c67 ("Automate
generate on man pages") in 2001 and @program@ is ineffective since then.

Because PROGRAM substitution does nothing, removing this manual
substitution should be completely safe.

binutils/ChangeLog:

	* doc/local.mk: Remove unused substitution PROGRAM.
	* Makefile.in: Regenerate.

binutils/Makefile.in

@@ -2136,8 +2136,7 @@ doc/$(DEMANGLER_NAME).1: doc/cxxfilt.man Makefile doc/$(am__dirstamp)
 	else \
 	  man=$(srcdir)/doc/cxxfilt.man; \
 	fi; \
-	sed -e 's/@PROGRAM@/$(DEMANGLER_NAME)/' \
-	    -e 's/cxxfilt/$(DEMANGLER_NAME)/' < $$man \
+	sed -e 's/cxxfilt/$(DEMANGLER_NAME)/' < $$man \
 		> doc/$(DEMANGLER_NAME).1
 
 html-local: doc/binutils/index.html

binutils/doc/local.mk

@@ -169,8 +169,7 @@ MAINTAINERCLEANFILES += $(man_MANS) %D%/binutils.info %D%/cxxfilt.man
 	else \
 	  man=$(srcdir)/%D%/cxxfilt.man; \
 	fi; \
-	sed -e 's/@PROGRAM@/$(DEMANGLER_NAME)/' \
-	    -e 's/cxxfilt/$(DEMANGLER_NAME)/' < $$man \
+	sed -e 's/cxxfilt/$(DEMANGLER_NAME)/' < $$man \
 		> %D%/$(DEMANGLER_NAME).1
 
 html-local: %D%/binutils/index.html