Replace @ts-ignore with @ts-expect-error

[pjonsson]

What this PR does

This uncovered some ignores that could be removed.

Test me

Comment only changes.

Checklist

• [X] There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)
• [ ] I've updated relevant documentation in doc/.
• [ ] I've updated CHANGES.md with what I changed.
• [X] I've provided instructions in the PR description on how to test this PR.