f2fs: delete unnecessary wait for page writeback

no need to wait inline file page writeback for no one
use it, so this patch delete unnecessary wait.

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index fc4d298..0be4a9b 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -124,8 +124,7 @@
 	if (err)
 		return err;
 
-	f2fs_wait_on_page_writeback(page, DATA, true);
-
+	f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
 	if (PageUptodate(page))
 		goto no_update;