[FOLLOWUP] Disable functionality to hide file storage

Also remove an obsolete sql key and remaing TCA from the hidden column

Releases: master
Resolves: #59017
Change-Id: I0b4bfa0036eab6a69cb548bd5e21d0569b7dfbf7
Reviewed-on: http://review.typo3.org/36474


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>