The counterparts to the add methods are the methods for removing commerce items, shipping groups, and payment groups from an Order. They are:
CommerceItemManager.removeItemFromOrder()ShippingGroupManager.removeShippingGroupFromOrder()PaymentGroupManager.removePaymentGroupFromOrder()
These methods take an Order and their respective object ID as parameters. The object ID is found in the id property of the CommerceItem, ShippingGroup, or PaymentGroup.
To remove subitems from configurable commerce items, use one of these methods:
CommerceItemManager.removeSubItemFromConfigurableItem()CommerceItemManager.removeAllSubItemsFromConfigurableItem()
