[TASK] Remove obsolete emConf settings

Releases: 6.2
Resolves: #58478
Change-Id: Ie6f472e7fd1353af93fb3ce3ab6f7eaed933a091
Reviewed-on: https://review.typo3.org/29841
Reviewed-by: Oliver Klee
Reviewed-by: Nico de Haen
Tested-by: Nico de Haen