I don't know the correct way to do this, but I was looking at the [commit that added donations](https://github.com/codidact/qpixel/commit/8dcf4050ca779f8e562c6596a41b28a06c184558), and I wonder, as a workaround until you get the correct answer (presumably from Art), it would work to comment out a couple things.
Specifically, can you find the place in the project where `app/assets/javascripts/donations.js` is being loaded and comment that out? This appears to be the entry point for calling all the Stripe stuff, so if it never gets loaded, maybe nothing ever gets checked.
If that's not enough, I also see this in `app/views/layouts/_head.html.erb`, and I wonder what happens if it's not there:
<%= javascript_include_tag "https://js.stripe.com/v3/" %>
I'm obviously just guessing (and I don't even know exactly what an ERB file is); my goal is to get you unblocked until we get the real answer. Maybe my guesses are all wrong but you, looking at that commit, can see what needs to be done.