Remove rubocop todo for EmptyLineAfterFinalLet

What does this MR do?

Fixes #34182 (closed)

This is the big finale. Clean up newly introduced stragglers and remove the TODO for EmptyLineAfterFinalLet

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Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
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Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

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