pack-objects: drop unused parameter from oe_map_new_pack()

Since 43fa44fa3b (pack-objects: move in_pack out of struct object_entry,
2018-04-14), we store the source pack for each object as a small index
rather than as a pointer. When we see a new pack that has no allocated
index, we fall back to generating an array of pointers by calling
oe_map_new_pack().

Perhaps counter-intuitively, that function does not need to actually see
our new index-less pack. It only allocates and populates the array with
the existing packs, after which oe_set_in_pack() actually adds the new
pack to the array.

Let's drop the unused "struct packed_git" argument to oe_map_new_pack()
to avoid confusion.

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

pack-objects.c

@@ -119,8 +119,7 @@ static void prepare_in_pack_by_idx(struct packing_data *pdata)
  * this fall back code, just stay simple and fall back to using
  * in_pack[] array.
  */
-void oe_map_new_pack(struct packing_data *pack,
-		     struct packed_git *p)
+void oe_map_new_pack(struct packing_data *pack)
 {
 	uint32_t i;
 

pack-objects.h

@@ -247,14 +247,14 @@ static inline struct packed_git *oe_in_pack(const struct packing_data *pack,
 		return pack->in_pack[e - pack->objects];
 }
 
-void oe_map_new_pack(struct packing_data *pack,
-		     struct packed_git *p);
+void oe_map_new_pack(struct packing_data *pack);
+
 static inline void oe_set_in_pack(struct packing_data *pack,
 				  struct object_entry *e,
 				  struct packed_git *p)
 {
 	if (!p->index)
-		oe_map_new_pack(pack, p);
+		oe_map_new_pack(pack);
 	if (pack->in_pack_by_idx)
 		e->in_pack_idx = p->index;
 	else