build/change_trust.go
func RemoveTrust(code, issuer string, args ...interface{}) (result ChangeTrustBuilder) {
	mutators := []interface{}{
		CreditAsset(code, issuer),
		Limit("0"),
	}

	for _, mut := range args {
		mutators = append(mutators, mut)
	}

	return ChangeTrust(mutators...)
}
func RemoveTrust(code, issuer string, args ...interface{}) (result ChangeTrustBuilder) {
	mutators := []interface{}{
		CreditAsset(code, issuer),
		Limit("0"),
	}

	for _, mut := range args {
		mutators = append(mutators, mut)
	}

	return ChangeTrust(mutators...)
}
// RemoveTrust is a helper that creates ChangeTrustBuilder