def acl_delete(consul_url=None, token=None, **kwargs):
    '''
    Delete an ACL token.

    :param consul_url: The Consul server URL.
    :param id: Unique identifier for the ACL to update.
    :return: Boolean & message of success or failure.

    CLI Example:

    .. code-block:: bash

        salt '*' consul.acl_delete id='c1c4d223-91cb-3d1f-1ee8-f2af9e7b6716'

    '''
    ret = {}
    data = {}
    if not consul_url:
        consul_url = _get_config()
        if not consul_url:
            log.error('No Consul URL found.')
            ret['message'] = 'No Consul URL found.'
            ret['res'] = False
            return ret

    if 'id' not in kwargs:
        ret['message'] = 'Required parameter "id" is missing.'
        ret['res'] = False
        return ret

    function = 'acl/delete/{0}'.format(kwargs['id'])
    res = _query(consul_url=consul_url,
                 token=token,
                 data=data,
                 method='PUT',
                 function=function)

    if res['res']:
        ret['res'] = True
        ret['message'] = 'ACL {0} deleted.'.format(kwargs['id'])
    else:
        ret['res'] = False
        ret['message'] = ('Removing ACL '
                          '{0} failed.'.format(kwargs['id']))

    return ret