fix(billing): track cloud payment attribution

app/javascript/dashboard/api/enterprise/account.js

@@ -1,6 +1,5 @@
 /* global axios */
 import ApiClient from '../ApiClient';
-import { getBillingAttribution } from '../../helper/billingAttribution';
 
 class EnterpriseAccountAPI extends ApiClient {
   constructor() {
@@ -12,9 +11,7 @@ class EnterpriseAccountAPI extends ApiClient {
   }
 
   subscription() {
-    return axios.post(`${this.url}subscription`, {
-      billing_attribution: getBillingAttribution(),
-    });
+    return axios.post(`${this.url}subscription`);
   }
 
   getLimits() {

app/javascript/dashboard/api/enterprise/specs/account.spec.js

@@ -42,10 +42,7 @@ describe('#enterpriseAccountAPI', () => {
     it('#subscription', () => {
       accountAPI.subscription();
       expect(axiosMock.post).toHaveBeenCalledWith(
-        '/enterprise/api/v1/subscription',
-        {
-          billing_attribution: { visitor_id: undefined, session_id: undefined },
-        }
+        '/enterprise/api/v1/subscription'
       );
     });