Revert "testing out a change for #117"

This reverts commit e2ed603.

js/AriaLiveAnnouncer.ts

@@ -30,6 +30,7 @@ import stepTimer from '../../axon/js/stepTimer.js';
 import Enumeration from '../../phet-core/js/Enumeration.js';
 import EnumerationValue from '../../phet-core/js/EnumerationValue.js';
 import optionize from '../../phet-core/js/optionize.js';
+import platform from '../../phet-core/js/platform.js';
 import { PDOMUtils } from '../../scenery/js/imports.js';
 import Announcer, { AnnouncerAnnounceOptions, AnnouncerOptions } from './Announcer.js';
 import Utterance from './Utterance.js';
@@ -230,18 +231,15 @@ class AriaLiveAnnouncer extends Announcer {
         // https://github.com/phetsims/scenery-phet/issues/491
         stepTimer.setTimeout( () => {
 
-          // if ( platform.safari ) {
-          //
-          //   // Using `hidden` rather than clearing textContent works better on mobile VO,
-          //   // see https://github.com/phetsims/scenery-phet/issues/490
-          //   liveElement.hidden = true;
-          // }
-          // else {
-          //   liveElement.textContent = '';
-          // }
-
-          // TODO: testing out this change to see if it fixes a VoiceOver problem, see https://github.com/phetsims/utterance-queue/issues/117
-          liveElement.textContent = '';
+          if ( platform.safari ) {
+
+            // Using `hidden` rather than clearing textContent works better on mobile VO,
+            // see https://github.com/phetsims/scenery-phet/issues/490
+            liveElement.hidden = true;
+          }
+          else {
+            liveElement.textContent = '';
+          }
 
           // Wait until after this timeout to let the UtteranceQueue can announce Utterances again. This delay
           // seems to be necessary to force VoiceOver to speak aria-live alerts in first-in-first-out order.