consolidate instance.js into index.js

Signed-off-by: Arthur Lu <learthurgo@gmail.com>

index.html

@@ -10,7 +10,6 @@
 		<link rel="stylesheet" href="css/nav.css">
 		<link rel="stylesheet" href="css/form.css">
 		<script src="scripts/index.js" type="module"></script>
-		<script src="scripts/instance.js" type="module"></script>
 	</head>
 	<body>
 		<header>