set() {
            throw new Error(
                "Tried setting a M2M field. Please use the related QuerySet methods add, remove and clear."
            );
        }
Removes references to all passed OtherModel instances from the current model.

E.g. Book.first().authors.remove(1, 2) would cause the authors with
IDs 1 and 2 to no longer be referenced by the first book.

@return undefined