Remove unused Google Analytics code

[sarayourfriend]

Fixes

Related to WordPress/openverse#634 by @sarayourfriend

Description

We don't use it. There's no reason to ship this code to our clients even if it's disabled.

Testing Instructions

Checkout this branch then run pnpm dev and test out navigating the website. Things should work! Try copying attribution and ensure there are no errors there as well, that was really the only place there was any GA code anyway.

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

Developer Certificate of Origin

Developer Certificate of Origin

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[obulat]

LGTM!

[zackkrida]

This one also looks good. I tried to make sure there was no additional documentation or anything referencing Google Analytics and I don't see anything. Great to ship less code and offer users better privacy!