Removed redundant wait at shutdown in the ALSA audio driver

(cherry picked from commit 97e2951875fbc306e03f115a6f73992ffa167593)

src/audio/alsa/SDL_alsa_audio.c

@@ -461,12 +461,6 @@ static void ALSA_CloseDevice(SDL_AudioDevice *device)
 {
     if (device->hidden) {
         if (device->hidden->pcm) {
-            // Wait for the submitted audio to drain. ALSA_snd_pcm_drop() can hang, so don't use that.
-            int delay = ((device->sample_frames * 1000) / device->spec.freq) * 2;
-            if (delay > 100) {
-                delay = 100;
-            }
-            SDL_Delay(delay);
             ALSA_snd_pcm_close(device->hidden->pcm);
         }
         SDL_free(device->hidden->mixbuf);