Remove call to formWidth.

Change-Id: I0cdc8ca07917d1a8a7fab52d7bc19294739db6d1
Resolves: #72750
Releases: master
Reviewed-on: https://review.typo3.org/45964


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>