receive-pack: don't mention successful updates

The proposed updates are already shown to the user by
send-pack, so there's no point. We continue to show errors,
since they are unexpected.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

receive-pack.c

@@ -204,8 +204,6 @@ static const char *update(struct command *cmd)
 			error("failed to delete %s", name);
 			return "failed to delete";
 		}
-		fprintf(stderr, "%s: %s -> deleted\n", name,
-			sha1_to_hex(old_sha1));
 		return NULL; /* good */
 	}
 	else {
@@ -217,8 +215,6 @@ static const char *update(struct command *cmd)
 		if (write_ref_sha1(lock, new_sha1, "push")) {
 			return "failed to write"; /* error() already called */
 		}
-		fprintf(stderr, "%s: %s -> %s\n", name,
-			sha1_to_hex(old_sha1), sha1_to_hex(new_sha1));
 		return NULL; /* good */
 	}
 }