Removes unused parameter in nav_links

What does this MR do and why?

Removes the unless parameter that is no longer used in our code.

It was added here: 9ed8c8ca and the file that uses this property has since been refactored.

There were no unit tests for this parameter, so no test changes are needed.

Screenshots or screen recordings

NA

How to set up and validate locally

NA

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #341576 (closed)