protected function _deleteACL(Horde_Imap_Client_Mailbox $mailbox, $identifier)
{
// DELETEACL returns no untagged information (RFC 4314 [3.2]).
$this->_sendCmd($this->_command('DELETEACL')->add(array($this->_getMboxFormatOb($mailbox), new Horde_Imap_Client_Data_Format_Astring($identifier))));
}