[PATCH 0/14] more -Wunused-parameter annotations

Here's another set of patches to silence -Wunused-parameter warnings. With the exception of the first patch, these are all just adding annotations (though I tried to document in each one any digging I did on "this isn't a bug that we're not using it, right?").

So I don't think these should be controversial. But I wanted to mention that I'll be offline for a month starting July 5th. So if there is any substantive review after that, I'll be rather slow to respond. :)

  [01/14]: test-ref-store: drop unimplemented reflog-expire command
  [02/14]: do_for_each_ref_helper(): mark unused repository parameter
  [03/14]: http: mark unused parameters in curl callbacks
  [04/14]: http-push: mark unused parameter in xml callback
  [05/14]: am: mark unused keep_cr parameters
  [06/14]: count-objects: mark unused parameter in alternates callback
  [07/14]: revisions: drop unused "opt" parameter in "tweak" callbacks
  [08/14]: fsck: mark unused parameters in various fsck callbacks
  [09/14]: merge-tree: mark unused parameter in traverse callback
  [10/14]: replace: mark unused parameter in ref callback
  [11/14]: replace: mark unused parameter in each_mergetag_fn callback
  [12/14]: rev-parse: mark unused parameter in for_each_abbrev callback
  [13/14]: tag: mark unused parameters in each_tag_name_fn callbacks
  [14/14]: t/helper: mark unused callback void data parameters

 builtin/am.c                     |  4 ++--
 builtin/count-objects.c          |  2 +-
 builtin/diff-tree.c              |  2 +-
 builtin/fsck.c                   | 10 +++++-----
 builtin/index-pack.c             |  3 ++-
 builtin/log.c                    |  6 ++----
 builtin/merge-tree.c             |  4 +++-
 builtin/mktag.c                  |  8 ++++----
 builtin/replace.c                |  4 ++--
 builtin/rev-parse.c              |  2 +-
 builtin/tag.c                    |  4 ++--
 builtin/unpack-objects.c         |  3 ++-
 fsck.c                           |  4 ++--
 http-push.c                      |  2 +-
 http.c                           |  9 ++++++---
 object-file.c                    | 10 +++++-----
 refs.c                           |  2 +-
 revision.c                       |  2 +-
 revision.h                       |  2 +-
 t/helper/test-dump-split-index.c |  2 +-
 t/helper/test-oid-array.c        |  2 +-
 t/helper/test-ref-store.c        |  6 ------
 22 files changed, 46 insertions(+), 47 deletions(-)

-Peff