[CLEANUP] Cleanup \EBT\ExtensionBuilder\Domain\Model\Person

Resolves: #58270
Releases: 6.2
Change-Id: I230b509c997c3d273092ae03adc5c0441fcb3e06
Reviewed-on: https://review.typo3.org/29690
Reviewed-by: Nico de Haen
Tested-by: Nico de Haen