Analytics: use GA4 tag only (#1010)

config.yaml

@@ -1,5 +1,6 @@
 baseURL: https://grpc.io/
 disableKinds: [taxonomy, term]
+googleAnalytics: G-8H17ZWYV40
 
 theme: [docsy]
 

layouts/partials/google-analytics.html

@@ -1,13 +0,0 @@
-{{ $ga4_id := "G-8H17ZWYV40" -}}
-{{ $cnfc_id := "UA-163836834-2" -}}
-{{ $google_id := "UA-60127042-1" -}}
-<script async src="https://www.googletagmanager.com/gtag/js?id={{ $ga4_id }}"></script>
-<script>
-  window.dataLayer = window.dataLayer || [];
-  function gtag(){dataLayer.push(arguments);}
-  gtag('js', new Date());
-
-  gtag('config', '{{ $ga4_id }}');
-  gtag('config', '{{ $cnfc_id }}');
-  gtag('config', '{{ $google_id }}');
-</script>

layouts/partials/hooks/head-end.html

@@ -1,5 +1,2 @@
-{{ if hugo.IsProduction -}}
-  {{ partial "google-analytics.html" . -}}
-{{ end -}}
 {{ partial "meta.html" . -}}
 {{ partial "favicons.html" . -}}