[!!!][TASK] TCA: Remove "parentPageTca" FormDataProvider

The property "vanillaParentPageTca " inside FormEngine
is never used - also documented that it was never used before.

The property is therefore removed.

Resolves: #88669
Releases: master
Change-Id: I71166ea44764d8bdc4b0c309a43f45f46309780f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61207


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>