Disable analytics for non-production environment

The analytics code/link is not always working. It takes about 33 seconds
to fail when building local sites for testing, and that is terrible.

This PR disables the analytics in non-production environment, so local
build starts up in seconds!

layouts/partials/git-info.html

@@ -3,9 +3,11 @@
   <hr/>
 
   <div class="issue-button-container">
+    {{ if eq (getenv "HUGO_ENV") "production" }}
     <p>
       <a href=""><img alt="Analytics" src="https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/{{ .Path }}?pixel"/></a>
     </p>
+    {{ end }}
     {{ if and (ne .Kind "404") (not (strings.Contains .Path "search")) }}
       {{ if not .Params.no_issue }}
         <script type="text/javascript">