Merge branch 'jk/unused'

Code cleanup.

* jk/unused:
  dir.c: drop unused "untracked" from treat_path_fast()
  sequencer: handle ignore_footer when parsing trailers
  test-advise: check argument count with argc instead of argv
  sparse-checkout: fill in some options boilerplate
  sequencer: drop repository argument from run_git_commit()
  push: drop unused repo argument to do_push()
  assert PARSE_OPT_NONEG in parse-options callbacks
  env--helper: write to opt->value in parseopt helper
  drop unused argc parameters
  convert: drop unused crlf_action from check_global_conv_flags_eol()

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