[ADAP-519] Remove unused # type: ignore

[Fokko]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward extension of existing dbt-spark functionality, rather than a Big Idea better suited to a discussion

Describe the feature

I noticed that there are quite a few # type: ignore around. I enabled the --warn-unused-ignores flag and found out that some of them are not needed.

Describe alternatives you've considered

No response

Who will this benefit?

No response

Are you interested in contributing this feature?

Yes

Anything else?

Small one :)

[dbeatty10]

Thank you @Fokko for noticing and opening a PR ❤️