...that had been left behind by d6308705
"pywizards: get rid of ViewHandler" and caused "from .LetterWizardDialogImpl
import LetterWizardDialogImpl" in CallWizard.py to fail.

Change-Id: I51dcb2812863f502bc06e3e3b07285f6c31714ca
(cherry picked from commit 15560086)
Reviewed-on: https://gerrit.libreoffice.org/1670Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>