southbridge/amd/agesa/hudson: Unused func smbus_delay()

Spotted by Clang

Change-Id: Ic5b04f6f334bc9b1b014a7ada44e9656f7992063
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5847
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/southbridge/amd/agesa/hudson/smbus.c

@@ -24,11 +24,6 @@
 #include <stdint.h>
 #include "smbus.h"
 
-static inline void smbus_delay(void)
-{
-	outb(inb(0x80), 0x80);
-}
-
 static int smbus_wait_until_ready(u32 smbus_io_base)
 {
 	u32 loops;