builtin-pack-objects: remove unnecessary code for no-delta

As we do not consider objects marked as "no-delta" early, there
is no point to check if the other objects already in the delta
window are marked as such -- "no-delta" objects will not enter
the window to begin with.

Pointed out by Nico.

Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-pack-objects.c

@@ -1409,8 +1409,6 @@ static void find_deltas(struct object_entry **list, int window, int depth)
 			m = array + other_idx;
 			if (!m->entry)
 				break;
-			if (m->entry->no_try_delta)
-				continue;
 			if (try_delta(n, m, max_depth) < 0)
 				break;
 		}