cpu/amd: Remove unused <cbmem.h>

Change-Id: Ie9344da411a86186fa161e82db3c3fd3ffb911f6
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61049
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/cpu/amd/pi/00730F01/model_16_init.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <cbmem.h>
 #include <commonlib/helpers.h>
 #include <console/console.h>
 #include <cpu/amd/microcode.h>