stale files in the tree

Isn't it time to drop aureal support from the tree?
  * src/sys/dev/sound/pci/au88x0.c
  * src/sys/dev/sound/pci/au88x0.h

The files aren't used for a long time, last vital change was in 2003 and 
driver still not connected to the main process. However 
ports/audio/aureal-kmod works good, but states that mentioned files must 
be erased. After removing them we can get the port compile smoothly and 
get rid of some old junk.

-- 
Sphinx of black quartz judge my vow.