fix: fix build errors

src/pages/Route/DemoPage/index.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from "react";
+import { useEffect } from "react";
 import { useParams } from "react-router-dom";
 import { apiStore } from "../../../client/src/api/ApiStore/store";
 import App from "../../../client/src/App";