Revert "[FEATURE] Allow different overriding of object mapping per plugin"

This reverts commit fecb7b1b32629283aa932cde38bdd26ee94dcf8d.

Releases: 6.1
Change-Id: I448b1fd0638a86ab31705be1c87056bc082b0dc8
Reviewed-on: https://review.typo3.org/17597
Reviewed-by: Alexander Schnitzler
Tested-by: Alexander Schnitzler