nvme: remove opportunistic polling from bdev target

It doesn't set HIPRI on the bio, so polling for it is pretty silly.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/nvme/target/io-cmd-bdev.c

@@ -115,8 +115,6 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req)
 	}
 
 	cookie = submit_bio(bio);
-
-	blk_poll(bdev_get_queue(req->ns->bdev), cookie);
 }
 
 static void nvmet_bdev_execute_flush(struct nvmet_req *req)