To delete one or more relationship constraints, use the following procedure:
1. Select Edit from the Actions menu to enter edit mode.
2. Select the checkbox next to each relationship constraint to be deleted. System-defined relationship constraints cannot be deleted.
3. Click the delete icon. When prompted, click OK to confirm the delete action.
Deleted relationship constraints are not permanently deleted until Done or Save are clicked on the type information page. For more information, see View and Edit Modes.