Remove more debugging from builtin-fetch

Older git-fetch.sh doesn't print "ref: X" when invoked as
`git fetch $url X" so we shouldn't do that now in the new
builtin version.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-fetch.c

@@ -530,8 +530,6 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 		}
 		refs[j] = NULL;
 		ref_nr = j;
-		for (j = 0; refs[j]; j++)
-			printf("ref: %s\n", refs[j]);
 	}
 
 	signal(SIGINT, unlock_pack_on_signal);