dm verity fec: remove redundant unlikely annotation

unlikely has already included in IS_ERR(),
so just remove redundant unlikely annotation.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-verity-fec.c

@@ -73,7 +73,7 @@ static u8 *fec_read_parity(struct dm_verity *v, u64 rsb, int index,
 	*offset = (unsigned)(position - (block << v->data_dev_block_bits));
 
 	res = dm_bufio_read(v->fec->bufio, v->fec->start + block, buf);
-	if (unlikely(IS_ERR(res))) {
+	if (IS_ERR(res)) {
 		DMERR("%s: FEC %llu: parity read failed (block %llu): %ld",
 		      v->data_dev->name, (unsigned long long)rsb,
 		      (unsigned long long)(v->fec->start + block),
@@ -163,7 +163,7 @@ static int fec_decode_bufs(struct dm_verity *v, struct dm_verity_fec_io *fio,
 			dm_bufio_release(buf);
 
 			par = fec_read_parity(v, rsb, block_offset, &offset, &buf);
-			if (unlikely(IS_ERR(par)))
+			if (IS_ERR(par))
 				return PTR_ERR(par);
 		}
 	}
@@ -253,7 +253,7 @@ static int fec_read_bufs(struct dm_verity *v, struct dm_verity_io *io,
 		}
 
 		bbuf = dm_bufio_read(bufio, block, &buf);
-		if (unlikely(IS_ERR(bbuf))) {
+		if (IS_ERR(bbuf)) {
 			DMWARN_LIMIT("%s: FEC %llu: read failed (%llu): %ld",
 				     v->data_dev->name,
 				     (unsigned long long)rsb,