aoe: remove unused NARGS enum

The NARGS enum is left over from older code versions.
Signed-off-by: N"Ed L. Cashin" <ecashin@coraid.com>
Acked-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/block/aoe/aoechr.c

@@ -15,7 +15,6 @@ enum {
 	MINOR_INTERFACES,
 	MINOR_REVALIDATE,
 	MSGSZ = 2048,
-	NARGS = 10,
 	NMSG = 100,		/* message backlog to retain */
 };