[TASK] Remove undefined property iconFactory from EditFileController

The property is not defined at all. We can retrieve the iconFactory
from the moduleTemplate.

Resolves: #78662
Releases: master
Change-Id: Id51ac702b9a9e57d731014e86e1637632aadcb38
Reviewed-on: https://review.typo3.org/50597


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>