[BUGFIX] DependencyUtility does count() on an integer

Remove the superfluous count() call.

Resolves: #58529
Releases: 6.2, 6.1, 6.0
Change-Id: I0933650b52063009de52268034480f6e06af56ac
Reviewed-on: https://review.typo3.org/29876
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind