winstore: Don't free the audio client.

It is owned by an external component.

modules/audio_output/winstore.c

@@ -197,7 +197,6 @@ static void Close(vlc_object_t *obj)
     audio_output_t *aout = (audio_output_t *)obj;
     aout_sys_t *sys = aout->sys;
 
-    free(sys->client);
     free(sys);
 }