fixing music simulator

libs/core/music.cpp

@@ -8,21 +8,10 @@ namespace music {
      */
     //% help=music/play-tone weight=90
     //% blockId=device_play_note block="play|tone %note=device_note|for %duration=device_beat" icon="\uf025" blockGap=8
-    //% parts="speaker"
+    //% parts="speaker" async
     void playTone(int freqency, int ms) {
         uBit.soundmotor.soundOn(freqency);
         if(ms > 0) uBit.sleep(ms);
         uBit.soundmotor.soundOff();
     }
-
-    /**
-     * Plays a tone through ``speaker``.
-     * @param frequency pitch of the tone to play in Hertz (Hz)
-     */
-    //% help=music/ring-tone weight=80
-    //% blockId=device_ring block="ring tone (Hz)|%note=device_note" icon="\uf025" blockGap=8
-    //% parts="speaker"
-   void ringTone(int frequency) {
-      playTone(frequency, 0);
-   }
 }