responsive star button, remove unused code

frontend/frontend/src/pages/App/Header.js

@@ -83,7 +83,7 @@ const Header = ({ mode, stage, setStage }) => {
             )}
           </Link>
           {/* Star on GitHub */}
-          <div className="hidden md:flex ml-auto items-center text-base justify-center">
+          <div className="flex ml-auto items-center text-base justify-center">
             <a
               href="https://www.github.com/avgupta456/github-trends"
               target="_blank"

frontend/frontend/src/pages/Misc/NoMatch.js

@@ -1,32 +0,0 @@
-import React from 'react';
-
-import { Link } from 'react-router-dom';
-
-import { Button } from '../../components';
-
-const NoMatchScreen = () => {
-  return (
-    <div className="h-full w-full flex flex-col justify-center items-center">
-      <div className="flex">
-        <div className="pr-8 text-5xl font-semibold text-blue-500">404</div>
-        <div className="flex flex-col">
-          <div className="pl-8 border-l-2 border-gray-200">
-            <div className="text-5xl font-bold text-gray-900">
-              Page not Found
-            </div>
-            <div className="text-lg text-gray-500 mt-2">
-              Please check the URL in the address bar and try again.
-            </div>
-          </div>
-          <Link to="/" className="ml-8 mt-8">
-            <Button className="bg-blue-500 hover:bg-blue-600 text-white">
-              Go to Home
-            </Button>
-          </Link>
-        </div>
-      </div>
-    </div>
-  );
-};
-
-export default NoMatchScreen;

frontend/frontend/src/pages/Misc/index.js

@@ -1,3 +0,0 @@
-import NoMatchScreen from './NoMatch';
-
-export { NoMatchScreen };

frontend/frontend/src/utils.js

@@ -1,8 +1,3 @@
-export function sleep(ms) {
-  // eslint-disable-next-line no-promise-executor-return
-  return new Promise((resolve) => setTimeout(resolve, ms));
-}
-
 export function classnames(...args) {
   return args.join(' ');
 }