sys/log/stub: Remove unneeded cbmem dep
#include "log/log.h"
#include "fcb/fcb.h"
-#include "cbmem/cbmem.h"
#ifdef __cplusplus
extern "C" {
#endif
+struct cbmem;
typedef int (* log_fcb_slot1_reinit_fcb_fn) (struct fcb_log *arg);
struct log_fcb_slot1 {
