Goals

recover hard drive space once a storage deal terminates by deleting the generated file

Implementation

This is definitely a minimal approach, but it should get the job done -- just delete the generated file when the storage deal finishes executing, and clear the Lotus import

For discussion

For a succesful deal, this won't delete until the deal goes to StorageDealActive, which can be a long time. Technically, we could delete it sooner. Is it important to add code to check for the state when the data transfer is open and delete it then (StorageDealCheckForAcceptance)