Delete dupe 404 page

apps/docs/pages/404.tsx

@@ -1,52 +0,0 @@
-import { useEffect, useState } from 'react'
-import Link from 'next/link'
-import { Button } from 'ui'
-import Head from 'next/head'
-
-export default function Custom404() {
-  const [show404, setShow404] = useState<boolean>(false)
-
-  useEffect(() => {
-    setTimeout(() => {
-      setShow404(true)
-    }, 500)
-  }, [])
-
-  return (
-    <>
-      <Head>
-        <title>404 | Supabase</title>
-      </Head>
-      <div className="relative mx-auto flex h-screen w-full flex-col items-center justify-center">
-        <div className="absolute">
-          <h1
-            className={`text-scale-1200 select-none text-[14rem] opacity-[5%] filter transition duration-200 sm:text-[18rem] lg:text-[28rem] ${
-              show404 ? 'blur-sm' : 'blur-none'
-            }`}
-          >
-            404
-          </h1>
-        </div>
-        <div
-          className={`flex flex-col items-center justify-center space-y-6 transition ${
-            show404 ? 'opacity-100' : 'opacity-0'
-          }`}
-        >
-          <div className="text-scale-1200 flex w-[320px] flex-col items-center justify-center space-y-3">
-            <h1 className="m-2 text-2xl">Looking for something?</h1>
-            <p className="text-center text-sm">
-              We could not find the page that you are looking for!
-            </p>
-          </div>
-          <div className="flex items-center space-x-4">
-            <Link href="/">
-              <Button as="a" size="small" className="text-white">
-                Head back
-              </Button>
-            </Link>
-          </div>
-        </div>
-      </div>
-    </>
-  )
-}