[TASK] Remove unused PHP class imports

Some PHP classes still contain unused use statements. They have been removed.

Thanks to @cd on his initial patch
https://review.typo3.org/52014/

Resolves: 83432
Releases: master
Change-Id: I9020f505a826c40fcf11f75f87245293e7c6154f
Reviewed-on: https://review.typo3.org/55217


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>