There is a way to delete from the main home base (not the E-file home base) by highlighting the copy that you want to get rid of and choosing to delete from the 1st drop down button. 

 Or you could open the Copied file and change the social security number to something like 912-34-xxxx. then close that file and do a file name change in the main home base to SmithDuplxxxx so that it will be out of the way.