minix: remove unnecessary dentry_unhash on rmdir, dir rename

Minix has no issues with references to unlinked directories.
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/minix/namei.c

@@ -168,8 +168,6 @@ static int minix_rmdir(struct inode * dir, struct dentry *dentry)
 	struct inode * inode = dentry->d_inode;
 	int err = -ENOTEMPTY;
 
-	dentry_unhash(dentry);
-
 	if (minix_empty_dir(inode)) {
 		err = minix_unlink(dir, dentry);
 		if (!err) {
@@ -192,9 +190,6 @@ static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
 	struct minix_dir_entry * old_de;
 	int err = -ENOENT;
 
-	if (new_inode && S_ISDIR(new_inode->i_mode))
-		dentry_unhash(new_dentry);
-
 	old_de = minix_find_entry(old_dentry, &old_page);
 	if (!old_de)
 		goto out;