Deletes a policy from the LoadBalancer. The specified policy must not
        be enabled for any listeners.

def delete_lb_policy(self, lb_name, policy_name):
        """
        Deletes a policy from the LoadBalancer. The specified policy must not
        be enabled for any listeners.
        """
        params = {
                    'LoadBalancerName'          : lb_name,
                    'PolicyName'                : policy_name,
                 }
        return self.get_status('DeleteLoadBalancerPolicy', params)