build/manage_offer.go
func DeleteOffer(rate Rate, offerID OfferID) (result ManageOfferBuilder) {
	return ManageOffer(false, rate, Amount("0"), offerID)
}
func DeleteOffer(rate Rate, offerID OfferID) (result ManageOfferBuilder) {
	return ManageOffer(false, rate, Amount("0"), offerID)
}
// DeleteOffer deletes an existing offer