[TASK] Remove leftover FormEngine TSconfig values

Several infos in TSconfig / FormEngine are never used,
the field "storage_pid" does not even exist anymore in v8
(was moved to compatibility6 for v7).

Resolves: #73612
Releases: master
Change-Id: Iec578faa6dc591ad39eddcfbb8c6d06910e13950
Reviewed-on: https://review.typo3.org/46822


Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Reviewed-by: Andreas Wolf <andreas.wolf@typo3.org>
Tested-by: Andreas Wolf <andreas.wolf@typo3.org>