refactor: remove deprecated `@netlify/framework-info`

[serhalp]

Summary

@netlify/framework-info was superseded by @netlify/build-info a long time ago, but the entire codebase seemingly still existed to support a couple utility function calls. I refactored these away and deleted the package.

This isn't a breaking change, as this won't result in any releases of any packages with breaking changes. We'll just stop cutting new releases of @netlify/framework-info, but we already stopped doing that long ago. Any remaining consumers should refactor to use @netlify/build-info.

To do

• [ ] Implement replacement for listFrameworks()

[github-actions[bot]]

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