Prerequisites
You have created an interface format.
You are in the
tree structure and all table objects are displayed with all field objects.Procedure

When you select an object, the Interface Toolbox includes all dependent objects in the object hierarchy. This means that all objects subordinate to the object to be deleted will also be selected.
The system deletes all selected objects including those subordinate to the object to be deleted.
Result
You have deleted objects from the tree structure.