Delete Files

I looked in the file/stream/resourcemanager code in the engine and see all kinds of file manipulation routines but dont see a script call to delete a file. I have saved mission files that I would like to allow the user to delete from the gui rather than digging into directories and manually delete them.
Is there a function in the engine to delete a file in a directory or do I have to write one? If I have to write one could someone tell me how do to it without messing up the resource/stream manager.... thanks...