Remove unused diffcore_std_no_resolve

This was only used by diff-tree-helper program, whose purpose
was to translate a raw diff to a patch.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/diff.c b/diff.c
index cc81801..7d938c1 100644
--- a/diff.c
+++ b/diff.c
@@ -2917,17 +2917,6 @@
 }
 
 
-void diffcore_std_no_resolve(struct diff_options *options)
-{
-	if (options->pickaxe)
-		diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
-	if (options->orderfile)
-		diffcore_order(options->orderfile);
-	diffcore_apply_filter(options->filter);
-	if (options->exit_with_status)
-		options->has_changes = !!diff_queued_diff.nr;
-}
-
 void diff_addremove(struct diff_options *options,
 		    int addremove, unsigned mode,
 		    const unsigned char *sha1,
diff --git a/diff.h b/diff.h
index d13fc89..81fa265 100644
--- a/diff.h
+++ b/diff.h
@@ -173,8 +173,6 @@
 
 extern void diffcore_std(struct diff_options *);
 
-extern void diffcore_std_no_resolve(struct diff_options *);
-
 #define COMMON_DIFF_OPTIONS_HELP \
 "\ncommon diff options:\n" \
 "  -z            output diff-raw with lines terminated with NUL.\n" \