staging: line6: drop MIDI dumping code

ALSA amidi(1) and aseqdump(1) can be used to dump MIDI instead of
manually dumping MIDI messages in the driver.  The advantage of using
these existing tools is that can be used at run-time rather than
compile-time.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/line6/driver.c

@@ -402,9 +402,6 @@ static void line6_data_received(struct urb *urb)
 			continue;
 
 		line6->message_length = done;
-#ifdef CONFIG_LINE6_USB_DUMP_MIDI
-		line6_write_hexdump(line6, 'r', line6->buffer_message, done);
-#endif
 		line6_midi_receive(line6, line6->buffer_message, done);
 
 		switch (line6->usbdev->descriptor.idProduct) {

drivers/staging/line6/midi.c

@@ -59,9 +59,6 @@ static void line6_midi_transmit(struct snd_rawmidi_substream *substream)
 		if (done == 0)
 			break;
 
-#ifdef CONFIG_LINE6_USB_DUMP_MIDI
-		line6_write_hexdump(line6, 's', chunk, done);
-#endif
 		line6_midibuf_write(mb, chunk, done);
 		snd_rawmidi_transmit_ack(substream, done);
 	}