Delete WhatsApp phone number assignment

Permanently remove a phone number assignment from this voice agent using the assignment_id (not phone_number_id).

The assignment_id is the ‘id’ field returned when creating or listing assignments. To find the assignment_id for a specific phone number, use GET /voice_agents//whatsapp/phone_numbers.

After deletion:

• Voice calls to this number will not be handled by this agent
• If this was the primary assignment, you should assign a new primary number
• Active voice calls may be dropped

This operation cannot be undone. If you need to temporarily disable routing, use PATCH to set enabled=false instead.