[BUGFIX] Followup to deprecate FormEngine methods

see "Deprecate unused methods from FormEngine"
from issue #63912 which uses a wrong "use" statement.
thus a fatal for all input fields with selects happens.

Releases: master
Resolves: #63914
Change-Id: Ib8916e2f8c0ad98e70c3ee0fcc4a8cd5b85ca5c4
Reviewed-on: http://review.typo3.org/35494
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>