[TASK] Clean up ext:beuser permission module access checks

The access module is restricted to admin users since core 6.0.
The patch removes left over code checks for non admin users.

Resolves: #64416
Related: #41229
Releases: master
Change-Id: I6fddc2eb1ae8a720c3d157993621fe201bd692e7
Reviewed-on: http://review.typo3.org/36169


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>