fix(api): remove dead code in rbac test

Remove unused `app` variable from 'returns 403 when staff record is
not resolved' test - the test uses `testApp` instead.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/__tests__/rbac.test.ts

@@ -289,7 +289,6 @@ describe("requireSuperUser", () => {
   });
 
   it("returns 403 when staff record is not resolved", async () => {
-    const app = buildWithStaff(MANAGER, requireSuperUser());
     // Manually remove staff from context to simulate unresolved staff
     const testApp = new Hono<AppEnv>();
     testApp.use("*", async (c, next) => {