[TASK] Remove unnecessary conditionals

PHPStan says all of these are unnecessary. On visual
inspection, it appears to be correct.

Used command:

> ./Build/Scripts/runTests.sh -s phpstanGenerateBaseline

Resolves: #98001
Releases: main, 11.5
Change-Id: Ic18ce25997357c786b17bc5be02cfdb3617c6eef
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75286


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>