src/superio: Remove unused 'include <arch/io.h>'

Change-Id: Ia08e27da51f1f523232379960dc21c1ba4849932
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36046
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/superio/ite/common/env_ctrl.c

@@ -18,7 +18,6 @@
  */
 
 #include <stdlib.h>
-#include <arch/io.h>
 #include <console/console.h>
 #include <delay.h>
 #include <superio/hwm5_conf.h>