where it was obsoleted by commits 2484de6728
(Remove non-const Sequence::begin()/end() in internal code, 2021-10-15) and
fb3c04bd19 (Drop non-const Sequence::operator[]
in internal code 2021-11-05).
Change-Id: Ia2b60af973183bbe79656e67b5e37d7efa39a308
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/166817
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>