delete
https://{youraccountname}.api-us1.com/api/3/contactDeals/
Removes a contact from a deal by the link's id. The deal and the contact themselves are not deleted. The contact's score values for that deal are deleted, and the removal is recorded as a deal activity. Needs the deals permission; 404 when no link has this id.
To delete a secondary contact, the user should have permission to manage deals.