chore: Remove test loader

Author: franky47

packages/e2e/remix/app/routes/key-isolation.useQueryState.tsx

@@ -1,10 +1,3 @@
 import { KeyIsolationUseQueryState } from 'e2e-shared/specs/key-isolation'
 
-const wait = (ms: number) => new Promise(resolve => setTimeout(resolve, ms))
-
-export async function loader() {
-  await wait(100)
-  return null
-}
-
 export default KeyIsolationUseQueryState