jbd2: fix incorrect code style

[ Upstream commit 60ed633f ]

Remove unnecessary blank.

Signed-off-by: Xianting Tian <xianting_tian@126.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/1595077057-8048-1-git-send-email-xianting_tian@126.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Stable-dep-of: e34c8dd2 ("jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint")
Signed-off-by: Sasha Levin <sashal@kernel.org>