block: remove the deprecated ub driver

It was scheduled to be removed in 3.6.
Acked-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/feature-removal-schedule.txt

@@ -495,17 +495,6 @@ Who:	Bjorn Helgaas <bhelgaas@google.com>
 
 ----------------------------
 
-What:	Low Performance USB Block driver ("CONFIG_BLK_DEV_UB")
-When:	3.6
-Why:	This driver provides support for USB storage devices like "USB
-	sticks". As of now, it is deactivated in Debian, Fedora and
-        Ubuntu. All current users can switch over to usb-storage
-        (CONFIG_USB_STORAGE) which only drawback is the additional SCSI
-        stack.
-Who:	Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
-
-----------------------------
-
 What:	get_robust_list syscall
 When:	2013
 Why:	There appear to be no production users of the get_robust_list syscall,

drivers/block/Kconfig

@@ -353,18 +353,6 @@ config BLK_DEV_SX8
 
 	  Use devices /dev/sx8/$N and /dev/sx8/$Np$M.
 
-config BLK_DEV_UB
-	tristate "Low Performance USB Block driver (deprecated)"
-	depends on USB
-	help
-	  This driver supports certain USB attached storage devices
-	  such as flash keys.
-
-	  If you enable this driver, it is recommended to avoid conflicts
-	  with usb-storage by enabling USB_LIBUSUAL.
-
-	  If unsure, say N.
-
 config BLK_DEV_RAM
 	tristate "RAM block device support"
 	---help---

drivers/block/Makefile

@@ -33,7 +33,6 @@ obj-$(CONFIG_VIRTIO_BLK)	+= virtio_blk.o
 
 obj-$(CONFIG_VIODASD)		+= viodasd.o
 obj-$(CONFIG_BLK_DEV_SX8)	+= sx8.o
-obj-$(CONFIG_BLK_DEV_UB)	+= ub.o
 obj-$(CONFIG_BLK_DEV_HD)	+= hd.o
 
 obj-$(CONFIG_XEN_BLKDEV_FRONTEND)	+= xen-blkfront.o