remove duplicate MMAPPER Kconfig option

This option is already in arch/um/Kconfig.char
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Jeff Dike <jdike@addtoit.com>

drivers/block/Kconfig

@@ -204,23 +204,6 @@ config BLK_DEV_COW_COMMON
 	bool
 	default BLK_DEV_UBD
 
-config MMAPPER
-	tristate "Example IO memory driver (BROKEN)"
-	depends on UML && BROKEN
-	---help---
-          The User-Mode Linux port can provide support for IO Memory
-          emulation with this option.  This allows a host file to be
-          specified as an I/O region on the kernel command line. That file
-          will be mapped into UML's kernel address space where a driver can
-          locate it and do whatever it wants with the memory, including
-          providing an interface to it for UML processes to use.
-
-          For more information, see
-          <http://user-mode-linux.sourceforge.net/iomem.html>.
-
-          If you'd like to be able to provide a simulated IO port space for
-          User-Mode Linux processes, say Y.  If unsure, say N.
-
 config BLK_DEV_LOOP
 	tristate "Loopback device support"
 	---help---