Remove an extra charge from an invoice.

        Args:
            recurring_billing_id: Identifier of the additional charge.

        Returns:

def delete_additional_charge(self, recurring_billing_id):
        """
        Remove an extra charge from an invoice.

        Args:
            recurring_billing_id: Identifier of the additional charge.

        Returns:

        """
        fmt = 'recurringBillItems/{}'.format(recurring_billing_id)
        return self.client._delete(self.url + fmt, headers=self.get_headers())