Update head_custom.html

Author: Hexagon

docs/_includes/head_custom.html

@@ -1,9 +1,2 @@
 <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-9224018205432249" crossorigin="anonymous"></script>
-<script async src="https://www.googletagmanager.com/gtag/js?id=G-873B7M42VH"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
-
-  gtag('config', 'G-873B7M42VH');
-</script>
+<script async src="https://track.webpulseanalytics.com/client/653ebe55c7b4c35cbdcbd694" type="module"></script>