I am working with a macro that I found and have limited knowledge of API. 

The macro I found creates a sepearte part file of each configuration a part has. 

I was thinking that the macro should remove the unused configurations from the saved part but it does not. 

I am not an expert in API whatsoever.  Attached is the macro.

Is this macro meant to strip the saved parts of the unused configs and if so why is it not?