[TASK] Remove conf.php from ext:lowlevel

Resolves: #63609
Releases: master
Change-Id: Ife621913bfad4f909ce8351774a5d7c7211f8822
Reviewed-on: http://review.typo3.org/35073
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>