Upgrade to Hugo 0.139.4 and stop using GAnalytics.

For some reason it fails when trying to load the Google Analytics
partial with the new version. However in the last Assembly we said we
want to remove Google Analytics, so removing it is the simple solution.

bin/install

@@ -3,8 +3,8 @@
 set -euo pipefail
 
 function install_hugo() {
-  echo -n "Installing Hugo 0.123.8... "
-  pip install hugo=="0.123.8"
+  echo -n "Installing Hugo 0.139.4... "
+  pip install hugo=="0.139.4"
   echo "OK!"
 }
 

themes/pybcn_theme/layouts/partials/head.html

@@ -24,8 +24,6 @@
    {{ printf `<link rel="%s" type="%s" href="%s" title="%s" />` .Rel .MediaType.Type .Permalink $.Site.Title | safeHTML }}
   {{ end -}}
 
-  {{ template "_internal/google_analytics_async.html" . }}
-
   {{ if .Site.Params.cookie_consent_info_url }}
     {{ partial "cookie-consent.html" . }}
   {{ end }}