[PATCH] remove drivers/net/hydra.h

Remove drivers/net/hydra.h which is both unused and covered by a 4 clause
BSD licence (not by the UCB).

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-By: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>