sb/amd/sb800: Remove unused smbus_delay() function

Change-Id: I08ed67dd7159f8a407d61c9b5fc69ff6aef10057
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/29843
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/amd/sb800/smbus.c

@@ -18,11 +18,6 @@
 
 #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;