audit: drop audit_set_macxattr as it doesn't do anything

extern void __audit_socketcall(int nargs, unsigned long *args);

extern int __audit_sockaddr(int len, void *addr);

extern void __audit_fd_pair(int fd1, int fd2);

extern int audit_set_macxattr(const char *name);

extern void __audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr);

extern void __audit_mq_sendrecv(mqd_t mqdes, size_t msg_len, unsigned int msg_prio, const struct timespec *abs_timeout);

extern void __audit_mq_notify(mqd_t mqdes, const struct sigevent *notification);

#define audit_socketcall(n,a) ((void)0)

#define audit_fd_pair(n,a) ((void)0)

#define audit_sockaddr(len, addr) ({ 0; })

#define audit_set_macxattr(n) do { ; } while (0)

#define audit_mq_open(o,m,a) ((void)0)

#define audit_mq_sendrecv(d,l,p,t) ((void)0)

#define audit_mq_notify(d,n) ((void)0)