dm: Remove unused declaration dm_get_rq_mapinfo()
Commit ae6ad75e5c3c ("dm: remove unused dm_get_rq_mapinfo()")
removed the implementation but leave declaration.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
authored by