Remove a tag from a contact by the tag's name, so a caller that only knows the name does not have to resolve it to a tag id and then to a contactTag id first. Remove a tag from a contact by id takes the tag id in the path, and Remove a tag from a contact takes the id of the contactTag association.

The name is trimmed and matched exactly; a name containing a comma or a line break is rejected rather than matched loosely, so a request never removes a tag the caller did not name. Deleted tags are not matched.

Only the association is removed: the tag itself and the contact both remain.

Requires permission to edit contacts and access to the contact.