src: Remove unused 'include <bootstate.h>'

Change-Id: I54eda3d51ecda77309841e598f06eb9cea3babc1
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41671
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/common/vbt.c

@@ -2,7 +2,6 @@
 
 #include <acpi/acpi.h>
 #include <bootmode.h>
-#include <bootstate.h>
 
 #include "vbt.h"
 #include <drivers/intel/gma/opregion.h>