Cleanup deliveryState or remove TODO

[vcabbage]

amqp/types.go

Lines 560 to 589 in ee6eb7e

	type deliveryState interface{} // TODO: http://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-transactions-v1.0-os.html#type-declared
	type unsettled map[string]deliveryState
	func (u unsettled) marshal(wr *buffer) error {
	return writeMap(wr, u)
	}
	func (u *unsettled) unmarshal(r *buffer) error {
	count, err := readMapHeader(r)
	if err != nil {
	return err
	}
	m := make(unsettled, count/2)
	for i := uint32(0); i < count; i += 2 {
	key, err := readString(r)
	if err != nil {
	return err
	}
	var value deliveryState
	err = unmarshal(r, &value)
	if err != nil {
	return err
	}
	m[key] = value
	}
	*u = m
	return nil
	}