dm integrity: 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-integrity.c

@@ -1122,7 +1122,7 @@ static int dm_integrity_rw_tag(struct dm_integrity_c *ic, unsigned char *tag, se
 			return r;
 
 		data = dm_bufio_read(ic->bufio, *metadata_block, &b);
-		if (unlikely(IS_ERR(data)))
+		if (IS_ERR(data))
 			return PTR_ERR(data);
 
 		to_copy = min((1U << SECTOR_SHIFT << ic->log2_buffer_sectors) - *metadata_offset, total_size);