Use the instructions in this section to delete types.
You can only remove a user-defined type from the repository if:
You are the owner of the type or have superuser privileges.
The type has no subtypes.
There are no existing objects of that type in the repository.
You cannot delete a shareable type that is shared by a lightweight sysobject. Delete the dependent lightweight objects first.
To delete a type:
Navigate to Administration > Types to access the Types list page.
A list of existing object types is displayed.
Select the type to delete.
Select File > Delete.
The type is deleted.