fix: remove unused router import from auth pages

apps/web/next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.d.ts";
+import "./.next/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

apps/web/src/app/(auth)/sign-in/page.tsx

@@ -2,11 +2,9 @@
 
 import { signIn } from '@/lib/auth-client';
 import Link from 'next/link';
-import { useRouter } from 'next/navigation';
 import { useState } from 'react';
 
 export default function SignInPage() {
-  const router = useRouter();
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
   const [error, setError] = useState('');

apps/web/src/app/(auth)/sign-up/page.tsx

@@ -2,11 +2,9 @@
 
 import { signUp } from '@/lib/auth-client';
 import Link from 'next/link';
-import { useRouter } from 'next/navigation';
 import { useState } from 'react';
 
 export default function SignUpPage() {
-  const router = useRouter();
   const [name, setName] = useState('');
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');