[TASK] Remove conf.php from ext:info

Resolves: #63610
Releases: master
Change-Id: I5eb82346151cb45efd38c870421141f58552308b
Reviewed-on: http://review.typo3.org/35074
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>