Remove dual-page property usage
We deprecated dual-page property and their corresponding getter and setter in Evince 3.8. We use page-layout instead.
We first stop using dual-page internally, and second, remove the deprecated API.
We deprecated dual-page property and their corresponding getter and setter in Evince 3.8. We use page-layout instead.
We first stop using dual-page internally, and second, remove the deprecated API.