ALSA: line6: Drop superfluous timer helper function

Now all timer usages in line6 drivers are gone, we can get rid of some
helper macro and function that became superfluous.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/line6/driver.h

@@ -68,13 +68,6 @@
 
 #define LINE6_CHANNEL_MASK 0x0f
 
-#define CHECK_STARTUP_PROGRESS(x, n)	\
-do {					\
-	if ((x) >= (n))			\
-		return;			\
-	x = (n);			\
-} while (0)
-
 extern const unsigned char line6_midi_id[3];
 
 static const int SYSEX_DATA_OFS = sizeof(line6_midi_id) + 3;
@@ -201,8 +194,6 @@ extern int line6_send_sysex_message(struct usb_line6 *line6,
 				    const char *buffer, int size);
 extern ssize_t line6_set_raw(struct device *dev, struct device_attribute *attr,
 			     const char *buf, size_t count);
-extern void line6_start_timer(struct timer_list *timer, unsigned long msecs,
-			      void (*function)(struct timer_list *t));
 extern int line6_version_request_async(struct usb_line6 *line6);
 extern int line6_write_data(struct usb_line6 *line6, unsigned address,
 			    void *data, unsigned datalen);