def delete_scheduled_action(self, scheduled_action_name,
                                autoscale_group=None):
        """
        Deletes a previously scheduled action.

        :type scheduled_action_name: str
        :param scheduled_action_name: The name of the action you want
            to delete.

        :type autoscale_group: str
        :param autoscale_group: The name of the autoscale group.
        """
        params = {'ScheduledActionName': scheduled_action_name}
        if autoscale_group:
            params['AutoScalingGroupName'] = autoscale_group
        return self.get_status('DeleteScheduledAction', params)