refactor: Removal of unneeded code

[grimpirate]

Description While making changes to #9928 noticed there were two variables prior to the return statement which add horizontal space padding around $max_lifetime. These statements are unnecessary and do not enhance code readability.

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [ ] User guide updated
• [x] Conforms to style guide