mtd_blkdevs: use the default discard granularity

The discard granularity now defaults to a single sector, so don't set
that value explicitly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Richard Weinberger <richard@nod.at>
Link: https://lore.kernel.org/r/20231228075545.362768-10-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/mtd/mtd_blkdevs.c

@@ -376,10 +376,8 @@ int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new)
 	blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq);
 	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq);
 
-	if (tr->discard) {
+	if (tr->discard)
 		blk_queue_max_discard_sectors(new->rq, UINT_MAX);
-		new->rq->limits.discard_granularity = tr->blksize;
-	}
 
 	gd->queue = new->rq;