[ALSA] usb-audio: remove superfluous include

Modules: USB generic driver

Remove a superfluous include of the sound/minors.h header.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

sound/usb/usbmidi.c

@@ -47,7 +47,6 @@
 #include <linux/timer.h>
 #include <linux/usb.h>
 #include <sound/core.h>
-#include <sound/minors.h>
 #include <sound/rawmidi.h>
 #include "usbaudio.h"