add eslint script

src/app.tsx

@@ -1,4 +1,4 @@
-import React, { Suspense } from "react";
+import React from "react";
 import { BrowserRouter } from "react-router-dom";
 import {Helmet} from 'react-helmet';
 

src/dashboard.tsx

@@ -3,7 +3,6 @@ import { Routes, Route } from 'react-router-dom';
 import { Spinner } from '@chakra-ui/react';
 
 import { UnderConstructionPage } from './pages';
-const Hello = () => <h1>Hello</h1>;
 
 export const Dashboard = () => {
   return (