arm: at91: drop unused Kconfig symbol

Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NMichal Marek <mmarek@suse.cz>

arch/arm/mach-at91/Kconfig

@@ -190,12 +190,6 @@ if ARCH_AT91SAM9260
 
 comment "AT91SAM9260 Variants"
 
-config ARCH_AT91SAM9260_SAM9XE
-	bool "AT91SAM9XE"
-	help
-	  Select this if you are using Atmel's AT91SAM9XE System-on-Chip.
-	  They are basically AT91SAM9260s with various sizes of embedded Flash.
-
 comment "AT91SAM9260 / AT91SAM9XE Board Type"
 
 config MACH_AT91SAM9260EK