NFS: Remove bogus nfs_mark_for_revalidate() in nfs_lookup

The parent of the newly materialised dentry has just been revalidated...
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/dir.c

@@ -929,14 +929,8 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru
 no_entry:
 	res = d_materialise_unique(dentry, inode);
 	if (res != NULL) {
-		struct dentry *parent;
 		if (IS_ERR(res))
 			goto out_unlock;
-		/* Was a directory renamed! */
-		parent = dget_parent(res);
-		if (!IS_ROOT(parent))
-			nfs_mark_for_revalidate(parent->d_inode);
-		dput(parent);
 		dentry = res;
 	}
 	nfs_set_verifier(dentry, nfs_save_change_attribute(dir));