This PR removes the `@tldraw/utils` package from the docs site's API
reference. It does this by removing it from the docs site's
`devDependencies`.
The reason for this is this:
<img width="899" alt="Screenshot 2023-06-15 at 15 52 24"
src="https://github.com/tldraw/tldraw/assets/15892272/3b00e9da-663d-45e5-8b77-ab0a4fc466ad">
### Change Type
- [x] `documentation` — Changes to the documentation only[^2]
[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version
### Test Plan
1. Check the API Reference page of the docs.
2. Make that `@tldraw/utils` isn't there.
### Release Notes
- [docs] Removed an internal utilities package.
6d4d9424df
