diff --git a/payment_gateway.go b/payment_gateway.go
index 966fee4..149d464 100644
--- a/payment_gateway.go
+++ b/payment_gateway.go
@@ -11,7 +11,6 @@ type PaymentGateway interface {
 	Void(transactionID string, params VoidParams) (VoidResponse, error)
 
 	Query(transactionID string) (Transaction, error)
-	//RakutePayApplicationMessage(amount uint64, params RakutenPayApplicationParams) (RakutenPayApplicationResponse, error)
 }
 
 // AuthorizeParams authorize params