mx35: Remove declaration of non-existing function

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/include/asm/arch-mx35/sys_proto.h

@@ -26,6 +26,5 @@
 
 u32 get_cpu_rev(void);
 #define is_soc_rev(rev)	((get_cpu_rev() & 0xFF) - rev)
-void sdelay(unsigned long);
 
 #endif