New docs site throwing `analytics` javascript error in console

[jazzsequence]

As best I can tell, all pages are throwing the following error in the javascript console: Uncaught ReferenceError: analytics is not defined.

I'm not sure if we can just remove analytics but if it's not working anyway, it's probably not helping anything.

[stevector]

We might need to make changes inside Google Tag Manager. I don't have write access there. I'm asking for assistance here: https://pantheon.slack.com/archives/C07HY5FKLB0/p1770418035175749