Merge pull request #67088 from rzarzynski/wip-crimson-ctwrn-unnused

crimson/os: fix multiple compile-time warnings on unused variables

Reviewed-by: Matan Breizman <mbreizma@redhat.com>

diff --cc src/crimson/os/seastore/omap_manager/btree/omap_btree_node_impl.h
Simple merge