[TASK] Cleanup invalid setting documentation

Removes invalid configuration documentation because it's completely
outdated.

Resolves: #77426
Releases: master
Change-Id: I83510ad25b097746123e7ca314041afd6e1dc8dd
Reviewed-on: https://review.typo3.org/49411


Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Frederic Gaus <frederic.gaus@flagbit.de>
Tested-by: Frederic Gaus <frederic.gaus@flagbit.de>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>