ocfs2: remove unnecessary dentry_unhash on rmdir/rename_dir

Ocfs2 has no issues with lingering references to unlinked directory inodes.

CC: Mark Fasheh <mfasheh@suse.com>
CC: ocfs2-devel@oss.oracle.com
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ocfs2/namei.c

@@ -810,9 +810,6 @@ static int ocfs2_unlink(struct inode *dir,
 			   (unsigned long long)OCFS2_I(dir)->ip_blkno,
 			   (unsigned long long)OCFS2_I(inode)->ip_blkno);
 
-	if (S_ISDIR(inode->i_mode))
-		dentry_unhash(dentry);
-
 	dquot_initialize(dir);
 
 	BUG_ON(dentry->d_parent->d_inode != dir);
@@ -1066,9 +1063,6 @@ static int ocfs2_rename(struct inode *old_dir,
 	struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
 	struct ocfs2_dir_lookup_result target_insert = { NULL, };
 
-	if (new_inode && S_ISDIR(new_inode->i_mode))
-		dentry_unhash(new_dentry);
-
 	/* At some point it might be nice to break this function up a
 	 * bit. */