The dispatch list is not used any more, as the legacy block IO stack
has been removed.
Reviewed-by: NBart Van Assche <bvanassche@acm.org>
Reviewed-by: NMing Lei <ming.lei@redhat.com>
Signed-off-by: NJunxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>