ASTERIXDB-3545 Remove Google Analytics from Historical Docs

[Niall Pemberton]

Hi,

I created a JIRA and PR to remove Google Analytics from historical docs in
January:

  https://issues.apache.org/jira/browse/ASTERIXDB-3545
  https://github.com/apache/asterixdb-site/pull/1

Could someone take a look at it please?

Thanks

Niall