gnu diff3: apply patch to committed src, rather than at build time

This appears to be a leftover from the time we used a less-capable VCS.

Reviewed by:	delphij
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D37368

contrib/diff/src/diff3.c

@@ -230,7 +230,6 @@ main (int argc, char **argv)
   initialize_main (&argc, &argv);
   program_name = argv[0];
   setlocale (LC_ALL, "");
-  bindtextdomain (PACKAGE, LOCALEDIR);
   textdomain (PACKAGE);
   c_stack_action (0);
 

gnu/usr.bin/diff3/Makefile

@@ -20,10 +20,4 @@ CFLAGS+=-DDEFAULT_DIFF_PROGRAM=\"/usr/bin/diff\"
 
 WARNS?=	0
 
-.for f in diff3.c
-${f}: ${DIFFSRC}/${f} ${.CURDIR}/${f}.diff
-	patch -s -o ${.TARGET} < ${.CURDIR}/${f}.diff ${DIFFSRC}/${f}
-CLEANFILES+= ${f}
-.endfor
-
 .include <bsd.prog.mk>

gnu/usr.bin/diff3/diff3.c.diff

@@ -1,11 +0,0 @@
-$FreeBSD$
---- diff3.c.orig	2004-04-12 15:44:35.000000000 +0800
-+++ diff3.c	2007-06-15 14:49:23.903835977 +0800
-@@ -230,7 +230,6 @@
-   initialize_main (&argc, &argv);
-   program_name = argv[0];
-   setlocale (LC_ALL, "");
--  bindtextdomain (PACKAGE, LOCALEDIR);
-   textdomain (PACKAGE);
-   c_stack_action (0);
-