[CLEANUP] Remove some unused variables and cleanup some code styles

Remove some unused variable and cleanup some PHP docs and some code styles

Resolves: #82364
Releases: master
Change-Id: I72f69a7c05514088bd318fed0e2c4ecc4710e183
Reviewed-on: https://review.typo3.org/53975


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Simon Praetorius <simon@praetorius.me>
Reviewed-by: Matthias Vogel <typo3@kanti.de>
Reviewed-by: Romain Canon <romain.hydrocanon@gmail.com>
Tested-by: Matthias Vogel <typo3@kanti.de>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>