fix: remove n8n route and env vars, billing portal always uses worker

Author: kof

apps/builder/app/env/env.server.ts

@@ -51,9 +51,6 @@ const env = {
       projectId.trim()
     ) ?? [],
 
-  N8N_WEBHOOK_URL: process.env.N8N_WEBHOOK_URL,
-  N8N_WEBHOOK_TOKEN: process.env.N8N_WEBHOOK_TOKEN,
-
   PUBLISHER_HOST: process.env.PUBLISHER_HOST || "wstd.work",
 
   STAGING_USERNAME: process.env.STAGING_USERNAME ?? "admin",

apps/builder/app/routes/n8n.$.tsx

@@ -2,7 +2,6 @@ import type { AUTH_PROVIDERS } from "~/shared/session";
 import { publicStaticEnv } from "~/env/env.static";
 import { getAuthorizationServerOrigin } from "./origins";
 import type { BuilderMode } from "../nano-states/misc";
-import { isFeatureEnabled } from "@webstudio-is/feature-flags";
 
 const searchParams = (params: Record<string, string | undefined | null>) => {
   const searchParams = new URLSearchParams();
@@ -116,11 +115,7 @@ export const userPlanSubscriptionPath = (subscriptionId?: string) => {
     urlSearchParams.set("subscription", subscriptionId);
   }
 
-  if (isFeatureEnabled("paymentWorker")) {
-    return `/builder-payments/billing-portal/sessions?${urlSearchParams.toString()}`;
-  }
-
-  return `/n8n/billing_portal/sessions?${urlSearchParams.toString()}`;
+  return `/builder-payments/billing-portal/sessions?${urlSearchParams.toString()}`;
 };
 
 export const authCallbackPath = ({