get rid of PrepareToClose

src/audio/SDL_audio.c

@@ -277,11 +277,6 @@ SDL_AudioFlushCapture_Default(_THIS)
 {                               /* no-op. */
 }
 
-static void
-SDL_AudioPrepareToClose_Default(_THIS)
-{                               /* no-op. */
-}
-
 static void
 SDL_AudioCloseDevice_Default(_THIS)
 {                               /* no-op. */
@@ -357,7 +352,6 @@ finish_audio_entry_points_init(void)
     FILL_STUB(GetDeviceBuf);
     FILL_STUB(CaptureFromDevice);
     FILL_STUB(FlushCapture);
-    FILL_STUB(PrepareToClose);
     FILL_STUB(CloseDevice);
     FILL_STUB(LockDevice);
     FILL_STUB(UnlockDevice);
@@ -773,8 +767,6 @@ SDL_RunAudio(void *devicep)
         }
     }
 
-    current_audio.impl.PrepareToClose(device);
-
     /* Wait for the audio to drain. */
     SDL_Delay(((device->spec.samples * 1000) / device->spec.freq) * 2);
 

src/audio/SDL_sysaudio.h

@@ -74,7 +74,6 @@ typedef struct SDL_AudioDriverImpl
     Uint8 *(*GetDeviceBuf) (_THIS);
     int (*CaptureFromDevice) (_THIS, void *buffer, int buflen);
     void (*FlushCapture) (_THIS);
-    void (*PrepareToClose) (_THIS);  /**< Called between run and draining wait for playback devices */
     void (*CloseDevice) (_THIS);
     void (*LockDevice) (_THIS);
     void (*UnlockDevice) (_THIS);