This update permanently removes a component related to VoIP functionality (voip_onsip) that was mistakenly reintroduced in a previous update. This ensures the system remains streamlined and focused on core business operations. The removal corrects a technical oversight from the 19.1 release.

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.

Forward-Port-Of: odoo/enterprise#116773