clean up diskxtender clips in Centera

We have successfully migrated \our data from Centera to ECS.   Now we want to clean up the Centera data in order to free up capacity.   For diskxtender, we do not have any delete rules defined.   I would like to know whether i can just use windows explorer and go to the diskxtender extended drive, and simply delete those stub file.  Will this issue an delete call to Centera to mark the clips for deletion?