[PATCH 0/5] refs: remove long-dead code

This removes dead code in the refs backend, mainly in the ref-cache. By line count this is mostly a straightforward follow-up to 9939b33d6a3 (packed-backend: rip out some now-unused code, 2017-09-08) and 9dd389f3d8d (packed_ref_store: get rid of the `ref_cache` entirely, 2017-09-25).

Ævar Arnfjörð Bjarmason (5):
  refs.[ch]: remove unused ref_storage_backend_exists()
  refs/ref-cache.[ch]: remove unused remove_entry_from_dir()
  refs/ref-cache.[ch]: remove unused add_ref_entry()
  refs/ref-cache.c: remove "mkdir" parameter from find_containing_dir()
  refs/ref-cache.[ch]: remove "incomplete" from create_dir_entry()

 refs.c               |  5 ---
 refs.h               |  2 -
 refs/files-backend.c |  6 +--
 refs/ref-cache.c     | 87 ++++++++------------------------------------
 refs/ref-cache.h     | 26 +------------
 5 files changed, 19 insertions(+), 107 deletions(-)