[TASK] Remove useless count function calls in stdWrap

Remove two count calls in the often called stdWrap function
to increase the performance. Furthermore remove the
is_callable calls, because the hook interface take care
that the methods exist and are callable.

Resolves: #55372
Releases: 6.2
Change-Id: Ifc8f831a7b101c5c56f717c23024fae7b71b71a9
Reviewed-on: https://review.typo3.org/27078
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Michiel Roos
Tested-by: Michiel Roos
Reviewed-by: Xavier Perseguers
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack