This update permanently removes the `voip_onsip` module, which was mistakenly reintroduced during the 19.1 release. The removal ensures a cleaner and more streamlined user experience. This resolves a technical issue that was causing unnecessary complexity.

While `voip_onsip` should have been removed altogether in 19.1, a commit adding new icons accidentally resurrected it.

This commit removes it for good.

This update aligns the Enterprise version of Odoo with recent changes in the Community edition. Specifically, MRP-related information has been removed from product documents, resulting in clearer and more consistent displays for ECOs. This simplifies the user experience and reduces potential confusion.

In the community, we are removing the product document from the BOM view and
also the MRP-related items from the product document, so we are adapting those
changes to align the enterprise with the community code.

ECOs now consistently show only product-related documents, improving clarity
and avoiding confusion.

task: 4593207

Community PR: odoo/odoo#200949