[ALSA] usb-audio - Fix double comment

Remove superfluous comment line (maybe a merge failure).
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>

sound/usb/usbquirks.h

@@ -101,7 +101,6 @@
 	.idProduct = 0x3f04,
 	.bInterfaceClass = USB_CLASS_AUDIO,
 },
-/*
 /*
  * Yamaha devices
  */