[TASK] Remove conf.php from ext:scheduler

Resolves: #63586
Releases: master
Change-Id: Ib19d2b77c7df7c009c9f905c0322a9b304fea0dc
Reviewed-on: http://review.typo3.org/35063
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>