This reverts commit c9493b34.

According to
https://bugs.documentfoundation.org/show_bug.cgi?id=96248#c15
the asert was gone even before the patch...

Anyway, better to have an assert than a crash

Change-Id: I84389bf2e8e604f6967923c0eedaae3aec3455e6
Reviewed-on: https://gerrit.libreoffice.org/65115
Tested-by: Jenkins
Reviewed-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>
(cherry picked from commit c5d0d424)
Reviewed-on: https://gerrit.libreoffice.org/65159
(cherry picked from commit 73c3c3de)