"yoga-playground" contains the code for the playground used on the Yoga website. It lives inside the "website" package, but also has its own separate package.json and lockfile.
The package wasn't ever published, and does not share a workspace with the website or other JS packages. We can remove the package.json and related files to remove the lockfile, build steps, etc, while letting it still be used by the website (the only thing using the playground right now).