Making the https://addons-dev.allizom.org/api/v4/shelves/ API request, it returns page_size, page_cont (with next/previous) - which became irrelevant and it should be dropped.

"page_size": 25,
"page_count": 1,
"count": 2,
"next": null,
"previous": null,

expected:
only return the results.