[TASK] Remove not needed autoload registry of form

The autoload registry entry of the form wizard
is superfluous now, so remove it.

Resolves: #57184
Releases: 6.2
Change-Id: Icc9e7a4791c5a2be95923f2e8bcad980dac611e8
Reviewed-on: https://review.typo3.org/28643
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters