Delete helloworld CLI tests (facebook#51533)

Summary:
Pull Request resolved: facebook#51533

Motivation:

- These fail, when ran from `packages/helloworld/` with the available `jest.config.js` file.
- These aren't currently run in CI.
- Don't seem high value (only covers `set-version` behaviour).

In the next diff, I will be adding a missing basic ReactTestRenderer test.

{F1978505710}

Changelog: [Internal]

Reviewed By: cortinico

Differential Revision: D75218694

fbshipit-source-id: b22f725aeea49deac069a3268bcf30d4981d44b6

Author: huntie