To remove a submission unit, select it in the tree and press the Delete submission unit button in the Inventory Pane.
The following conditions must be met:
The submission unit must not contain any file references, Node Extensions, or Lifecycle operators.
The removal must be performed in Origin view.
For a high level submission unit representing a regulatory activity, all related submission units, such as attached amendments, must be removed or moved to a different regulatory activity before it can be deleted.