docs: remove IE10 references from comments in the code (#39090)

PR Close #39090

packages/animations/browser/test/render/css_keyframes/css_keyframes_driver_spec.ts

@@ -106,7 +106,7 @@ describe('CssKeyframesDriver tests', () => {
 
     it('should animate until the `animationend` method is emitted, but stil retain the <style> method and the element animation details',
        fakeAsync(() => {
-         // IE10 and IE11 cannot create an instanceof AnimationEvent
+         // IE11 cannot create an instanceof AnimationEvent
          if (!supportsAnimationEventCreation()) return;
 
          const elm = createElement();

packages/animations/browser/test/render/css_keyframes/element_animation_style_handler_spec.ts

@@ -195,7 +195,7 @@ const EMPTY_FN = () => {};
     });
 
     it('should fire the onDone method when the matching animationend event is emitted', () => {
-      // IE10 and IE11 cannot create an instanceof AnimationEvent
+      // IE11 cannot create an instanceof AnimationEvent
       if (!supportsAnimationEventCreation()) return;
 
       const element = createElement();