[components / drivers]update audio_mic.c

1. delete '#include <rtservice.h>', because rtthread.h had include rtservice.h;
2. delete '#include <rtthread.h>', because rtdevice.h had include rtthread.h.

components/drivers/usb/usbdevice/class/audio_mic.c

@@ -9,8 +9,6 @@
  */
 
 #include <rthw.h>
-#include <rtthread.h>
-#include <rtservice.h>
 #include <rtdevice.h>
 
 #include "drivers/usb_device.h"