Remove unused router

pages/index.js

@@ -1,4 +1,3 @@
-import {useRouter} from 'next/router'
 import PropTypes from 'prop-types'
 import Container from '@mui/material/Container'
 import Typography from '@mui/material/Typography'
@@ -14,8 +13,6 @@ import KatKayLa from '../components/kat-kay-la'
 import Custom500 from './500'
 
 export default function Home({errorCode, errorMessage, stats}) {
-  const router = useRouter()
-
   if (errorCode) {
     console.log('⚠️ error', errorMessage)
     return <Custom500 statusCode={errorCode} />