[BUGFIX] Remove unneeded file_edit check

There is a left-over code after
file_edit.php was removed from
the core in 7.1 development.

The patch removes the check.

Releases: master
Resolves: #63686
Change-Id: I283ad1e7aea9f7f9d113ecc76178e1bf26504ca0
Reviewed-on: http://review.typo3.org/35170
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>