Delete a process swimlane ?

Summary:

Is there a way to delete a swimlane from a process?

Content (required):

Our process currently has about 20+ extra swimlanes below the lanes we actually use. They are all associated to Process Owner.

I'm looking for a way to remove these swimlanes. You will see that the extra lanes stretch the audit diagram and contains way too much extra/unneeded space.

Thanks

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