Revert "audiounit_ios: fix resume from pause"

This reverts commit 1ae26b6c.

This is not needed anymore since the clock is more stable.

This fixes:

• The player timer reset to 0 after a pause (since adf1d933)
• 1-2sec of silence when resuming from pause

modules/audio_output/audiounit_ios.m

@@ -506,14 +506,6 @@ Pause (audio_output_t *p_aout, bool pause, vlc_tick_t date)
     }
     p_sys->b_stopped = pause;
     ca_Pause(p_aout, pause, date);
-
-    /* Since we stopped the AudioUnit, we can't really recover the delay from
-     * the last playback. So it's better to flush everything now to avoid
-     * synchronization glitches when resuming from pause. The main drawback is
-     * that we loose 1-2 sec of audio when resuming. The order is important
-     * here, ca_Flush need to be called when paused. */
-    if (pause)
-        ca_Flush(p_aout);
 }
 
 static int