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

Change-Id: Ib41341b42904dc3050a97b70966dde7e46057d6b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43362
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/security/vboot/vboot_logic.c

@@ -3,7 +3,6 @@
 #include <arch/exception.h>
 #include <assert.h>
 #include <bootmode.h>
-#include <cbmem.h>
 #include <fmap.h>
 #include <security/tpm/tspi/crtm.h>
 #include <security/tpm/tss/vendor/cr50/cr50.h>