chore(index.html): remove unused Google Analytics script

- Deleted commented-out Google Analytics script block
- Removed unnecessary `main.js` script reference

index.html

@@ -133,17 +133,6 @@ <h2>Heading</h2>
 	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.4/jquery.min.js"></script>
 	<script src="js/plugins.js"></script>
 	<script src="plugin/bootstrap/js/bootstrap.min.js"></script>
-	<script src="js/main.js"></script>
-
-	<!-- Google Analytics: change UA-XXXXX-X to be your site's ID. -->
-	<!--
-        <script>
-            var _gaq=[['_setAccount','UA-XXXXX-X'],['_trackPageview']];
-            (function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
-            g.src='//www.google-analytics.com/ga.js';
-            s.parentNode.insertBefore(g,s)}(document,'script'));
-        </script>
--->
 
 </body>