sh: Kill off duplicate NODES_SHIFT.

We already set this in arch/sh/mm/Kconfig, don't set a conflicting
one in arch/sh/Kconfig too..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Kconfig

@@ -570,11 +570,6 @@ config NR_CPUS
 
 source "kernel/Kconfig.preempt"
 
-config NODES_SHIFT
-	int
-	default "1"
-	depends on NEED_MULTIPLE_NODES
-
 endmenu
 
 menu "Boot options"