remove analytics source (#2305)

We removed GA in 2018 but it seems like we missed removing
it from the partials and it is still being loaded.

Refs: nodejs/node#23083
Refs: #2302

external/survey-2018/index.html

@@ -4,8 +4,6 @@
   <meta charset="utf-8">
   <title>Web Survey Report 2018 | Node.js</title>
 
-  <link rel="dns-prefetch" href="https://www.google-analytics.com">
-
   <link rel="apple-touch-icon" href="/static/apple-touch-icon.png">
   <link rel="icon" sizes="32x32" type="image/png" href="/static/favicon.png">
 

layouts/partials/footer.hbs

@@ -53,30 +53,3 @@
 </script>
 
 <script src="/static/js/dnt_helper.js"></script>
-<script>
-  (function(){
-    if (!_dntEnabled()) {
-      !function(n,o,d,e,j,s){n.GoogleAnalyticsObject=d;n[d]||(n[d]=function(){
-      (n[d].q=n[d].q||[]).push(arguments)});n[d].l=+new Date;j=o.createElement(e);
-      s=o.getElementsByTagName(e)[0];j.async=1;j.src='//www.google-analytics.com/analytics.js';
-      s.parentNode.insertBefore(j,s)}(window,document,'ga','script');
-
-      if (!ga) return;
-
-      ga('create', 'UA-67020396-1', 'auto');
-      ga('send', 'pageview');
-
-      document.documentElement.addEventListener('click', function(e) {
-
-        // Track case studies
-        if(!e.target || !e.target.dataset || !e.target.dataset.casestudy) return;
-        ga('send', 'event', {
-          eventCategory: 'casestudy',
-          eventAction: 'click',
-          eventLabel: e.target.dataset.casestudy,
-          eventValue: 0
-        });
-      });
-    }
-  })();
-</script>

layouts/partials/html-head.hbs

@@ -4,7 +4,6 @@
 
   <link rel="dns-prefetch" href="https://fonts.googleapis.com">
   <link rel="dns-prefetch" href="https://fonts.gstatic.com">
-  <link rel="dns-prefetch" href="https://www.google-analytics.com">
 
   <meta name="author" content="{{ site.author }}">
   <meta name="robots" content="{{#if robots}}{{ robots }}{{else}}index, follow{{/if}}">