fix: improved accessibility for time display (#8182)

This change is to remove the aria-live attribute from time display elements. The aria-live attribute is no longer needed since the presentation role was added. Both attributes being present can lead to unexpected screen reader behavior.
Fixes issue #8143

src/js/control-bar/time-controls/time-display.js

@@ -57,13 +57,11 @@ class TimeDisplay extends Component {
     this.contentEl_ = Dom.createEl('span', {
       className: `${className}-display`
     }, {
-      // tell screen readers not to automatically read the time as it changes
-      'aria-live': 'off',
       // span elements have no implicit role, but some screen readers (notably VoiceOver)
       // treat them as a break between items in the DOM when using arrow keys
       // (or left-to-right swipes on iOS) to read contents of a page. Using
       // role='presentation' causes VoiceOver to NOT treat this span as a break.
-      'role': 'presentation'
+      role: 'presentation'
     });
 
     el.appendChild(this.contentEl_);