these macros and ioctls are unused

diff --git sys/net/if_tun.c sys/net/if_tun.c
index 9486afb1eaf..3edd937989b 100644
--- sys/net/if_tun.c
+++ sys/net/if_tun.c
@@ -35,8 +35,6 @@
  * operation though.
  */
 
-/* #define	TUN_DEBUG	9 */
-
 #include <sys/param.h>
 #include <sys/proc.h>
 #include <sys/systm.h>
@@ -90,13 +88,6 @@ struct tun_softc {
 	unsigned int		sc_reading;
 };
 
-#ifdef	TUN_DEBUG
-int	tundebug = TUN_DEBUG;
-#define TUNDEBUG(a)	(tundebug? printf a : 0)
-#else
-#define TUNDEBUG(a)	/* (tundebug? printf a : 0) */
-#endif
-
 /* Pretend that these IFF flags are changeable by TUNSIFINFO */
 #define TUN_IFF_FLAGS (IFF_POINTOPOINT|IFF_MULTICAST|IFF_BROADCAST)
 
@@ -727,14 +718,6 @@ tun_dev_ioctl(dev_t dev, u_long cmd, void *data)
 		tunp->flags = sc->sc_if.if_flags & TUN_IFF_FLAGS;
 		tunp->baudrate = sc->sc_if.if_baudrate;
 		break;
-#ifdef TUN_DEBUG
-	case TUNSDEBUG:
-		tundebug = *(int *)data;
-		break;
-	case TUNGDEBUG:
-		*(int *)data = tundebug;
-		break;
-#endif
 	case TUNSIFMODE:
 		if (*(int *)data != (sc->sc_if.if_flags & TUN_IFF_FLAGS)) {
 			error = EINVAL;
diff --git sys/net/if_tun.h sys/net/if_tun.h
index fb40345744e..5b5d340f268 100644
--- sys/net/if_tun.h
+++ sys/net/if_tun.h
@@ -107,10 +107,6 @@ struct tuninfo {
 /* ioctl for changing the broadcast/point-to-point status */
 #define TUNSIFMODE      _IOW('t', 93, int)
 
-/* ioctl's for get/set debug */
-#define	TUNSDEBUG	_IOW('t', 94, int)
-#define	TUNGDEBUG	_IOR('t', 95, int)
-
 struct tun_capabilities {
 	uint32_t	tun_if_capabilities; /* IFCAP_* from net/if.h */
 };