Remove uscanner(4). It was disabled in GENERIC more than 2.5 years ago.

No regression has been reported since libusb became the prefered
solution to work with USB scanners.
req. by mpi@
ok ian@ mpi@ miod@

src/etc/MAKEDEV.common

@@ -1,4 +1,4 @@
-vers(a, {-$OpenBSD: MAKEDEV.common,v 1.68 2013/07/06 17:33:44 naddy Exp $-})dnl
+vers(a, {-$OpenBSD: MAKEDEV.common,v 1.69 2013/08/20 14:27:24 ajacoutot Exp $-})dnl
 dnl
 dnl Copyright (c) 2001-2006 Todd T. Fries <todd@OpenBSD.org>
 dnl
@@ -181,7 +181,6 @@ __devitem(ramdisk, ramdisk, Ramdisk kernel devices,nothing)dnl
 dnl
 target(usb, usb, 0, 1, 2, 3, 4, 5, 6, 7)dnl
 target(usb, urio, 0)dnl
-twrget(usb, uscan, uscanner, 0)dnl
 target(usb, uhid, 0, 1, 2, 3)dnl
 target(usb, ulpt, 0, 1)dnl
 target(usb, ugen, 0, 1)dnl
@@ -378,8 +377,6 @@ _mkdev({-ttyU-}, {-ttyU[0-9a-zA-Z]-}, {-U=${i#ttyU*}
 	M cuaU$U c major_ttyU_c Add($o, 128) 660 dialer uucp-})dnl
 __devitem(urio, urio*, Diamond Multimedia Rio 500)dnl
 _mcdev({-urio-}, urio*, {-urio-}, {-major_urio_c-}, 660)dnl
-__devitem(uscan, uscanner*, Scanners,uscanner)dnl
-_mcdev({-uscan-}, uscanner*, {-uscanner-}, {-major_uscan_c-}, 660)dnl
 __devitem(ugen, ugen*, Generic USB devices)dnl
 _mkdev(ugen, ugen*, {-n=Mult($U, 16)
 	for j in 0{0,1,2,3,4,5,6,7,8,9} 1{0,1,2,3,4,5}