[TASK] Remove unused imports

Cleanup code by removing unused imports in various classes.

Also changes the corresponding ExtensionScanner tests because they
are counting the line numbers which changed by removing the imports.

Resolves: #89926
Releases: master, 9.5
Change-Id: I588a3aa778a342c6c1154bb431cd325497fd4d18
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62604


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>