Docs body is trying to load clarity.js but it doesn't exist #1953

When I load any docs page, the JavaScript console shows:

Failed to load resource: the server responded with a status of 404 ()
clarity.js:1 

It looks like the body footer is trying to load /js/clarity.js but this file does not exist in the repository.

We should either remove line 13 from body-end.html or add clarity.js to the repo.