src: Remove unneeded include <cbmem.h>

Change-Id: I89e03b6def5c78415bf73baba55941953a70d8de
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29302
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/security/vboot/vboot_loader.c

@@ -15,7 +15,6 @@
 
 #include <arch/early_variables.h>
 #include <cbfs.h>
-#include <cbmem.h>
 #include <console/console.h>
 #include <ec/google/chromeec/ec.h>
 #include <rmodule.h>