verify_one_sparse(): drop unused parameters
This function has never used its repository or cache_tree parameters
since it was introduced in
9ad2d5ea71 (sparse-index: loose integration
with cache_tree_verify(), 2021-03-30).
As that commit notes, it may eventually be extended further, and that
might require looking at more data. But we can easily add them back if
necessary (and the repository is even included in the index_state these
days already). In the mean time, dropping them makes the code shorter
and appeases -Wunused-parameter.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>