commit.c: remove print_commit_list()

The helper function tries to offer a way to conveniently show the
last one differently from others, presumably to allow you to say
something like

	A, B, and C.

while iterating over a list that has these three elements.

However, there is only one caller, and it passes the same format
string "%s\n" for both the last one and the other ones.  Retire the
helper function and update the caller with a simplified version.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

bisect.c

@@ -646,7 +646,10 @@ static void exit_if_skipped_commits(struct commit_list *tried,
 
 	printf("There are only 'skip'ped commits left to test.\n"
 	       "The first %s commit could be any of:\n", term_bad);
-	print_commit_list(tried, "%s\n", "%s\n");
+
+	for ( ; tried; tried = tried->next)
+		printf("%s\n", oid_to_hex(&tried->item->object.oid));
+
 	if (bad)
 		printf("%s\n", oid_to_hex(bad));
 	printf("We cannot bisect more!\n");

commit.c

@@ -1617,16 +1617,6 @@ struct commit_list **commit_list_append(struct commit *commit,
 	return &new->next;
 }
 
-void print_commit_list(struct commit_list *list,
-		       const char *format_cur,
-		       const char *format_last)
-{
-	for ( ; list; list = list->next) {
-		const char *format = list->next ? format_cur : format_last;
-		printf(format, oid_to_hex(&list->item->object.oid));
-	}
-}
-
 const char *find_commit_header(const char *msg, const char *key, size_t *out_len)
 {
 	int key_len = strlen(key);

commit.h

@@ -376,10 +376,6 @@ extern int parse_signed_commit(const struct commit *commit,
 			       struct strbuf *message, struct strbuf *signature);
 extern int remove_signature(struct strbuf *buf);
 
-extern void print_commit_list(struct commit_list *list,
-			      const char *format_cur,
-			      const char *format_last);
-
 /*
  * Check the signature of the given commit. The result of the check is stored
  * in sig->check_result, 'G' for a good signature, 'U' for a good signature