[CLEANUP] MENU Content Object classes

Change-Id: Ie911ce6da7fa60babc90104c27a45371c15492b4
Resolves: #64099
Releases: master
Reviewed-on: http://review.typo3.org/36584


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Frederic Gaus <gaus@flagbit.de>
Tested-by: Frederic Gaus <gaus@flagbit.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>