[PATCH -next] f2fs: remove set but not used variable 'err'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

fs/f2fs/data.c: In function 'f2fs_dio_submit_bio':
fs/f2fs/data.c:2585:6: warning:
 variable 'err' set but not used [-Wunused-but-set-variable]


Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 fs/f2fs/data.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f91d863..4e402ad 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -2582,14 +2582,11 @@ static void f2fs_dio_submit_bio(struct bio *bio, struct 
inode *inode,
 {
        struct f2fs_private_dio *dio;
        bool write = (bio_op(bio) == REQ_OP_WRITE);
-       int err;
 
        dio = f2fs_kzalloc(F2FS_I_SB(inode),
                        sizeof(struct f2fs_private_dio), GFP_NOFS);
-       if (!dio) {
-               err = -ENOMEM;
+       if (!dio)
                goto out;
-       }
 
        dio->inode = inode;
        dio->orig_end_io = bio->bi_end_io;