The expand, expand_limit and expand_groupby allowed to ask read_group to populate groups with search_read results directly. It was only used in the list view, when `expand="1"` was set on its root node in the arch. Since [1], the list view no longer uses these arguments, as we uniformized the logic between list and kanban (where groups are always opened by default). [1] https://github.com/odoo/odoo/pull/114024 Part of task~3179751 closes odoo/odoo#129881 Signed-off-by: Mathieu Duckerts-Antoine (dam) <dam@odoo.com>