Several classes include unused use statements. This patch removes those
statements or uses them in their code.

Resolves: #59997
Releases: 6.3
Change-Id: I5890a80bcee96976e3c35d967db8c53a9c11b002
Reviewed-on: https://review.typo3.org/31245
Reviewed-by: Alexander Opitz
Tested-by: Alexander Opitz
Reviewed-by: Oliver Klee
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters