Remove unused local diff. Pointed out by htodd.

external/gpl3/gcc/dist/libcpp/macro.c

@@ -406,33 +406,6 @@ add_cpp_remap_path (const char *arg)
 	++remap_pairs;
 }
 
-static const char *
-cpp_remap_file (const char *arg, char **tmp_name)
-{
-	char *result;
-	size_t i, len;
-
-	for (i = 0; i < remap_pairs; ++i) {
-		len = strlen (remap_src[i]);
-		if (strncmp (remap_src[i], arg, len))
-			continue;
-		if (arg[len] == '\0')
-			return remap_dst[i];
-		if (arg[len] != '/')
-			continue;
-		arg += len;
-		len = strlen (remap_dst[i]);
-		result = (char *) xmalloc (len + strlen (arg) + 1);
-		memcpy(result, remap_dst[i], len);
-		strcpy(result + len, arg);
-		*tmp_name = result;
-
-		return result;
-	}
-
-	return arg;
-}
-
 /* Helper function for builtin_macro.  Returns the text generated by
    a builtin macro. */
 const uchar *