[MAINTENANCE] Clean up type hints

[cdkini]

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Definition of Done

Please delete options that are not relevant.

• [ ] My code follows the Great Expectations style guide
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added unit tests where applicable and made sure that new and existing tests are passing.
• [ ] I have run any local integration tests and made sure that nothing is broken.

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