[TASK] Remove wrong trailing backslashes

Resolves: #53775
Releases: 6.2

Change-Id: Ie2126af0d4db034a07ad13dca951468d20c209f0
Reviewed-on: https://review.typo3.org/26861
Reviewed-by: Nico de Haen
Tested-by: Nico de Haen