Inline odb_load_loose_cache() into its only remaining caller,
odb_loose_cache(). The latter offers a nicer interface for loading the
cache, as it doesn't require callers to deal with fanout directory
numbers directly.
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>