mainboard/ti: Remove unused <cbmem.h>

Change-Id: If0d9910db1d5626c2d49b85cb7a1ad54e935791b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61053
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/ti/beaglebone/sd_media.c

@@ -5,7 +5,6 @@
 #include <console/console.h>
 #include <assert.h>
 #include <commonlib/storage/sd_mmc.h>
-#include <cbmem.h>
 #include <cbfs.h>
 
 #include <soc/ti/am335x/mmc.h>