Seems like those may only for deleting the files if you're adding them to an archive.
Parece ser o caso, sim,
$ unrar --help | grep -i unrar UNRAR 5.00 beta 8 freeware Copyright (c) 1993-2013 Alexander Roshal Usage: unrar command -switch1 -switchN archive files... $ unrar --help | grep del $ unrar --help | grep unlink $ unrar --help | grep rem
... nenhuma menção de remover qualquer coisa.