block/blk-map: Remove redundant assignment

Get rid of redundant assignment to a variable ret from function
bio_map_user_iov as it is being assigned a value that is never read.
It is being re-assigned in the first instruction after the while loop

Reported by clang-tidy [deadcode.DeadStores]
Signed-off-by: Michal Orzel <michalorzel.eng@gmail.com>
Link: https://lore.kernel.org/r/20220423113811.13335-2-michalorzel.eng@gmail.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-map.c

@@ -262,10 +262,9 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
 
 		npages = DIV_ROUND_UP(offs + bytes, PAGE_SIZE);
 
-		if (unlikely(offs & queue_dma_alignment(rq->q))) {
-			ret = -EINVAL;
+		if (unlikely(offs & queue_dma_alignment(rq->q)))
 			j = 0;
-		} else {
+		else {
 			for (j = 0; j < npages; j++) {
 				struct page *page = pages[j];
 				unsigned int n = PAGE_SIZE - offs;