code: @Override
  	public void discardState() throws Exception {
  		FileSystem fs = getFileSystem();
  		fs.delete(filePath, false);
  	}
docs: Discard the state by deleting the file that stores the state. If the parent directory
  of the state is empty after deleting the state file, it is also deleted.
  
  @throws Exception Thrown, if the file deletion (not the directory deletion) fails.