[CLEANUP] Drop incomplete tests

Resolves: #46871
Releases: 6.1
Change-Id: Ic9aabd83de82bb00be332956e4d5d9802d9a8952
Reviewed-on: https://review.typo3.org/19523
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring