f2fs: avoid redundant time update for parent directory in f2fs_delete_entry

In call to f2fs_delete_entry, 'dir' time modification code is put
at two places.
So, remove the redundant code for timing update.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 951ed52..989980e 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -503,7 +503,7 @@
 	}
 
 	if (inode) {
-		inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+		inode->i_ctime = CURRENT_TIME;
 		drop_nlink(inode);
 		if (S_ISDIR(inode->i_mode)) {
 			drop_nlink(inode);