md/raid10: remove dead code in reshape_request

A bio allocated by bio_alloc_bioset comes pre-zeroed, no need to
clear random fields.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NSong Liu <song@kernel.org>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/md/raid10.c

@@ -4539,10 +4539,6 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
 	read_bio->bi_private = r10_bio;
 	read_bio->bi_end_io = end_reshape_read;
 	bio_set_op_attrs(read_bio, REQ_OP_READ, 0);
-	read_bio->bi_flags &= (~0UL << BIO_RESET_BITS);
-	read_bio->bi_status = 0;
-	read_bio->bi_vcnt = 0;
-	read_bio->bi_iter.bi_size = 0;
 	r10_bio->master_bio = read_bio;
 	r10_bio->read_slot = r10_bio->devs[r10_bio->read_slot].devnum;