[TASK] Remove unused method in FormViewHelper

Resolves: #96403
Releases: main
Change-Id: Id4843f31254fe2b4bd46fe3c7c37669c6f3a06f0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72744


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>