fix linting

Author: Fan YANG

packages/react-router/__tests__/useBlocker-test.tsx

@@ -1,8 +1,8 @@
 import * as React from "react";
-import { render, screen, act } from "@testing-library/react";
+import { render, screen } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
+import type { Blocker } from "react-router";
 import {
-  Blocker,
   Link,
   Outlet,
   RouterProvider,

packages/react-router/lib/hooks.tsx

@@ -1290,7 +1290,7 @@ export function useBlocker(shouldBlock: boolean | BlockerFunction): Blocker {
   );
 
   let blockerKeyRef = React.useRef<string>("");
-  
+
   // This effect is in charge of blocker key assignment and deletion (which is
   // tightly coupled to the key)
   React.useEffect(() => {