build/manage_data.go
func ClearData(name string, muts ...interface{}) (result ManageDataBuilder) {
	result.MD.DataName = xdr.String64(name)
	result.MD.DataValue = nil
	result.validateName()
	result.Mutate(muts...)
	return
}
func ClearData(name string, muts ...interface{}) (result ManageDataBuilder) {
	result.MD.DataName = xdr.String64(name)
	result.MD.DataValue = nil
	result.validateName()
	result.Mutate(muts...)
	return
}
// ClearData removes a key/value pair associated with the source account