Delete listeners on an ELB.

    CLI example:

    .. code-block:: bash

        salt myminion boto_elb.delete_listeners myelb '[80,443]'

def delete_listeners(name, ports, region=None, key=None, keyid=None,
                     profile=None):
    '''
    Delete listeners on an ELB.

    CLI example:

    .. code-block:: bash

        salt myminion boto_elb.delete_listeners myelb '[80,443]'
    '''
    conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)

    if isinstance(ports, six.string_types):
        ports = salt.utils.json.loads(ports)
    try:
        conn.delete_load_balancer_listeners(name, ports)
        log.info('Deleted ELB listeners on %s', name)
        return True
    except boto.exception.BotoServerError as error:
        log.error('Failed to delete ELB listeners on %s: %s', name, error,
                  exc_info_on_loglevel=logging.DEBUG)
        return False