Remove Payment Information

CartServiceProvider provider = new CartServiceProvider();             
// You should get a real user id.            
string userId = Guid.NewGuid().ToString("B");            
string anonymousUserId =  Guid.NewGuid().ToString("B");              
var loadRequest = new LoadCartByNameRequest("Website", "MyBasket", userId);            
var loadResult = provider.LoadCart(loadRequest);             
CommerceCart cart = loadResult.Cart as CommerceCart;             
// Add the party (address) information.            
CommerceParty party = new CommerceParty()            
{                
ExternalId = Guid.NewGuid().ToString("B"),                
Name = "MyFirstAddress",                
Address1 = "Address 1 field",                 
Address2 = "Address 2 field",                
City = "City field",                
Company = "Company field",                
Country = "Country field",                
CountryCode ="CND",                
Email ="[email protected]",                
EveningPhoneNumber = "111 111-1111",                
FaxNumber = "222 222-2222",                
FirstName = "First name field",                
LastName = "Last name field",                
PhoneNumber = "333 333-3333",                
RegionCode = "01",                 
RegionName = "Region field",                
State = "State field",                
ZipPostalCode = "HOH OHO"            
};             
AddPartiesRequest request = new AddPartiesRequest(cart, new List<Party> { party });            
var result = provider.AddParties(request);             
party = result.Parties.ElementAt(0) as CommerceParty;             
// Get the payment methods 
CommerceOrderServiceProvider orderProvider = new CommerceOrderServiceProvider();             
GetPaymentMethodsRequest paymentMethodsRequest = new GetPaymentMethodsRequest("en-US");            
var paymentMethodsResult = orderProvider.GetPaymentMethods(paymentMethodsRequest);             
CommercePaymentMethod paymentMethod = paymentMethodsResult.PaymentMethods.ElementAt(0) as CommercePaymentMethod;             
CommerceCreditCardPaymentInfo payment = new CommerceCreditCardPaymentInfo();             
payment.CreditCardNumber = "1111111111111111";            
payment.Amount = 72.70M;            
payment.CreditCardIdentifier = "111";            
payment.CustomerNameOnPayment = "John Smith";            
payment.PartyID = party.ExternalId;            
payment.PaymentMethodID = paymentMethod.ExternalId;            
payment.ExpirationMonth = 10;            
payment.ExpirationYear =2020;             
var paymentRequest = new
AddPaymentInfoRequest(cart, new List<PaymentInfo> { payment });             
var paymentResult = provider.AddPaymentInfo(paymentRequest);             
cart = paymentResult.Cart as CommerceCart;             
CommerceCreditCardPaymentInfo currentPayment = cart.Payment.ElementAt(0) as CommerceCreditCardPaymentInfo;             
var removePaymentRequest = new RemovePaymentInfoRequest(cart, new List<PaymentInfo>() { currentPayment});           
provider.RemovePaymentInfo(removePaymentRequest);