pack-revindex: remove unused 'find_pack_revindex()'

Now that no callers of 'find_pack_revindex()' remain, remove the
function's declaration and implementation entirely.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

pack-revindex.c

@@ -189,21 +189,6 @@ int find_revindex_position(struct packed_git *p, off_t ofs)
 	return -1;
 }
 
-struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs)
-{
-	int pos;
-
-	if (load_pack_revindex(p))
-		return NULL;
-
-	pos = find_revindex_position(p, ofs);
-
-	if (pos < 0)
-		return NULL;
-
-	return p->revindex + pos;
-}
-
 int offset_to_pack_pos(struct packed_git *p, off_t ofs, uint32_t *pos)
 {
 	int ret;

pack-revindex.h

@@ -30,8 +30,6 @@ struct revindex_entry {
 int load_pack_revindex(struct packed_git *p);
 int find_revindex_position(struct packed_git *p, off_t ofs);
 
-struct revindex_entry *find_pack_revindex(struct packed_git *p, off_t ofs);
-
 /*
  * offset_to_pack_pos converts an object offset to a pack position. This
  * function returns zero on success, and a negative number otherwise. The