fix: make system-payment-provider.js pass eslint (#574)

.eslintignore

@@ -17,7 +17,6 @@
 /packages/medusa/src/services/shipping-profile.js
 /packages/medusa/src/services/store.js
 /packages/medusa/src/services/swap.js
-/packages/medusa/src/services/system-payment-provider.js
 /packages/medusa/src/services/totals.js
 
 /packages/medusa/src/subscribers/notification.js

packages/medusa/src/services/system-payment-provider.js

@@ -3,7 +3,7 @@ import { BaseService } from "medusa-interfaces"
 class SystemProviderService extends BaseService {
   static identifier = "system"
 
-  constructor({}) {
+  constructor(_) {
     super()
   }