Enh: Remove Google Tag

[sneakers-the-rat]

Currently the site embeds google analytics (twice actually, once for the gtagjs extension and another for the pydata theme).

Elsewhere, we give a rather stringent standard for opt-in data collection: https://www.pyopensci.org/software-peer-review/about/package-scope.html#telemetry-user-informed-consent

I think we could stand to do the same on our websites, no?

There is another tracker, matomo, that still attempts to embed itself in the page: https://github.com/pyOpenSci/python-package-guide/blob/main/_static/matomo.js
so analytics needs managed, hopefully?

Making this PR as a proposal, let's lead the way out of the darkness of surveillance web <3

[lwasser]

@sneakers-the-rat thank you! i moved all of our analytics to matomo so this is great to remove GA everywhere. it's what ropensci uses as well.

we probably need to make the same move in our peer review guide as well if you're up for a second PR.

what i could also use help with (IF you know how to make this happen) is ropensci has the "cookies notice" when you go to the site allowing the user to chose. do you happen to know how to set that up? i know it works with matomo. and i know matomo can be compliant (but correct me please if i'm wrong!!)

[lwasser]

Approving this and merging - thank you @sneakers-the-rat for this. i totally missed the last step of removing those deps and the GA code!