refactor(core): remove GA page views report (#1071)

- Google Analytics superProxy has been archived and is no longer maintained.
- Google Analytics UA end of life.

See also: https://support.google.com/analytics/answer/11583528?hl=en

_includes/head.html

@@ -11,16 +11,6 @@
     content="width=device-width, user-scalable=no initial-scale=1, shrink-to-fit=no, viewport-fit=cover"
   >
 
-  {% if page.layout == 'home' or page.layout == 'post' %}
-    {% if site.google_analytics.pv.proxy_endpoint %}
-      <meta name="pv-proxy-endpoint" content="{{ site.google_analytics.pv.proxy_endpoint }}">
-    {% endif %}
-
-    {% if site.google_analytics.pv.cache_path %}
-      <meta name="pv-cache-path" content="{{ site.google_analytics.pv.cache_path | relative_url }}">
-    {% endif %}
-  {% endif %}
-
   {% capture seo_tags %}
     {% seo title=false %}
   {% endcapture %}
@@ -76,17 +66,6 @@
 
     <link rel="preconnect" href="https://www.googletagmanager.com" crossorigin="anonymous">
     <link rel="dns-prefetch" href="https://www.googletagmanager.com">
-
-    {% if site.google_analytics.pv.proxy_endpoint %}
-      {% assign proxy_url = site.google_analytics.pv.proxy_endpoint
-        | replace: 'https://', ''
-        | split: '/'
-        | first
-        | prepend: 'https://'
-      %}
-      <link rel="preconnect" href="{{ proxy_url }}" crossorigin="use-credentials">
-      <link rel="dns-prefetch" href="{{ proxy_url }}">
-    {% endif %}
   {% endif %}
 
   <!-- Bootstrap -->

_includes/js-selector.html

@@ -11,13 +11,6 @@
 
 <!-- layout specified -->
 
-{% if page.layout == 'post' %}
-  {% if site.google_analytics.pv.proxy_endpoint or site.google_analytics.pv.cache_path %}
-    <!-- pv-report needs countup.js -->
-    {% assign urls = urls | append: ',' | append: site.data.origin[type].countup.js %}
-  {% endif %}
-{% endif %}
-
 {% if page.layout == 'post' or page.layout == 'page' or page.layout == 'home' %}
   {% assign urls = urls | append: ',' | append: site.data.origin[type].lazysizes.js %}