What I did to delete the uploaded file is to create a deleteBtn in the done: and add the click function to it and in there just do an ajax call using that file name, I had to also re-create the full file name that get's extra stuff put on it before writing it to disk somewhere, then it will delete it from the specified location from your props file.
Then just deleteBtn.appendTo($('#someOtherDiv')) that shows the uploaded file and then it has the delete button right next to it.