Remove left-over unused bits.

static void change_speed(struct dec_serial *info);

static void rs_wait_until_sent(struct tty_struct *tty, int timeout);

/*

 * tmp_buf is used as a temporary buffer by serial_write.  We need to

 * lock it in case the copy_from_user blocks while swapping in a page,

 * and some other program tries to do a serial write at the same time.

 * Since the lock will only come under contention when the system is

 * swapping and available memory is low, it makes sense to share one

 * buffer across all the serial ports, since it significantly saves

 * memory if large numbers of serial ports are open.

 */

static unsigned char tmp_buf[4096]; /* This is cheating */

static DECLARE_MUTEX(tmp_buf_sem);

static inline int serial_paranoia_check(struct dec_serial *info,

					char *name, const char *routine)

{