Revert "block: release rq qos structures for queue without disk"

This reverts commit daaca352.

Commit daaca352 ("block: release rq qos structures for queue without
disk") is only needed for v5.15~v5.17, and isn't needed for v5.18, so
revert it.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20220426024936.3321341-1-ming.lei@redhat.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>