[TASK] Remove leftovers in v12 breaking removal ReST

Resolves: #97061
Related: #96107
Releases: main
Change-Id: I808421151ae0576bf5bdbda51b95f2cc1790b4f9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73739


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>