RemoveUnused [padstack manager]
Use: Removes padstacks that are not used in the design.
Command: Project->Remove Unused Definitions is similar but operates slightly different and does not record script commands.
Return Value: <bool> True if one or more padstacks are removed.
Parameters: None
Note:
The order of calls to RemoveUnused is significant. As a result, removing definitions in an unordered fashion may cause other padstacks in dependent definitions to be rendered unusable.