[!!!][TASK] Remove deprecated code / TypoScript in EXT:frontend

Any code/options related to Frontend rendering / TypoScript that
has been deprecated in v8 is now removed.

Resolves: #80715
Resolves: #80711
Releases: master
Change-Id: I217cf2f936d6ce7fc0fe71ed970fed5d4f802535
Reviewed-on: https://review.typo3.org/52493


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>