diff --git a/packages/flutter/lib/src/rendering/binding.dart b/packages/flutter/lib/src/rendering/binding.dart
index 15cf986da5..f54d4a8f6c 100644
--- a/packages/flutter/lib/src/rendering/binding.dart
+++ b/packages/flutter/lib/src/rendering/binding.dart
@@ -790,20 +790,10 @@ class _BindingPipelineManifold extends ChangeNotifier implements PipelineManifol
       ChangeNotifier.maybeDispatchObjectCreation(this);
     }
     _binding.addSemanticsEnabledListener(notifyListeners);
-    if (_binding.semanticsEnabled) {
-      SystemChannels.accessibility.send(const GeneratingSemanticsTreeSemanticsEvent(true).toMap());
-    }
   }
 
   final RendererBinding _binding;
 
-  @protected
-  @override
-  void notifyListeners() {
-    SystemChannels.accessibility.send(GeneratingSemanticsTreeSemanticsEvent(_binding.semanticsEnabled).toMap());
-    super.notifyListeners();
-  }
-
   @override
   void requestVisualUpdate() {
     _binding.ensureVisualUpdate();
diff --git a/packages/flutter/lib/src/semantics/semantics_event.dart b/packages/flutter/lib/src/semantics/semantics_event.dart
index 5e17fdfb1c..b3751ea6c3 100644
--- a/packages/flutter/lib/src/semantics/semantics_event.dart
+++ b/packages/flutter/lib/src/semantics/semantics_event.dart
@@ -135,40 +135,6 @@ class TooltipSemanticsEvent extends SemanticsEvent {
   }
 }
 
-/// An event to notify native OS that flutter starts or stops the semantics tree
-/// generation
-///
-/// The [generating] indicate whether flutter starts generating the semantics
-/// tree. If true, flutter will start sending semantics update to platform
-/// embedding.
-///
-/// Embeddings must be ready to receive semantics update after they receive this
-/// event with [generating] set to true as framework will start sending
-/// semantics update in the next frame.
-///
-/// If [generating] is false, embeddings need to clean up previous updates as
-/// the framework semantics tree was completely destroyed.
-class GeneratingSemanticsTreeSemanticsEvent extends SemanticsEvent {
-
-  /// Constructs an event that notify platform whether it is generating
-  /// semantics tree.
-  const GeneratingSemanticsTreeSemanticsEvent(this.generating)
-      : super('generatingSemanticsTree');
-
-  /// Whether framework starts generating the semantics tree.
-  ///
-  /// If true, flutter starts sending semantics update to platform
-  /// embedding.
-  final bool generating;
-
-  @override
-  Map<String, dynamic> getDataMap() {
-    return <String, dynamic> {
-      'generating': generating,
-    };
-  }
-}
-
 /// An event which triggers long press semantic feedback.
 ///
 /// Currently only honored on Android. Triggers a long-press specific sound
diff --git a/packages/flutter/test/rendering/binding_pipeline_manifold_semantics_event_test.dart b/packages/flutter/test/rendering/binding_pipeline_manifold_semantics_event_test.dart
deleted file mode 100644
index b4e20b6405..0000000000
--- a/packages/flutter/test/rendering/binding_pipeline_manifold_semantics_event_test.dart
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'rendering_tester.dart';
-
-void main() {
-  test('Turning global semantics on/off sends semantics event', () {
-    TestRenderingFlutterBinding.ensureInitialized();
-    final List<dynamic> messages = <dynamic>[];
-    TestRenderingFlutterBinding.instance.defaultBinaryMessenger.setMockDecodedMessageHandler<dynamic>(
-      SystemChannels.accessibility,
-      (dynamic message) async {
-        messages.add(message);
-      }
-    );
-    final SemanticsHandle handle = TestRenderingFlutterBinding.instance.ensureSemantics();
-    expect(messages.length, 1);
-    expect(messages[0], <String, dynamic>{
-      'type': 'generatingSemanticsTree',
-      'data': <String, dynamic>{
-        'generating': true,
-      },
-    });
-
-    handle.dispose();
-    expect(messages.length, 2);
-    expect(messages[1], <String, dynamic>{
-      'type': 'generatingSemanticsTree',
-      'data': <String, dynamic>{
-        'generating': false,
-      },
-    });
-    TestRenderingFlutterBinding.instance.defaultBinaryMessenger.setMockDecodedMessageHandler<dynamic>(SystemChannels.accessibility, null);
-  });
-}
diff --git a/packages/flutter/test/widgets/feedback_test.dart b/packages/flutter/test/widgets/feedback_test.dart
index 40584f648d..e66bcc21ad 100644
--- a/packages/flutter/test/widgets/feedback_test.dart
+++ b/packages/flutter/test/widgets/feedback_test.dart
@@ -38,7 +38,7 @@ void main () {
 
     testWidgets('forTap', (WidgetTester tester) async {
       final SemanticsTester semanticsTester = SemanticsTester(tester);
-      semanticEvents.clear();
+
       await tester.pumpWidget(TestWidget(
         tapHandler: (BuildContext context) {
           return () => Feedback.forTap(context);
@@ -67,7 +67,7 @@ void main () {
 
     testWidgets('forTap Wrapper', (WidgetTester tester) async {
       final SemanticsTester semanticsTester = SemanticsTester(tester);
-      semanticEvents.clear();
+
       int callbackCount = 0;
       void callback() {
         callbackCount++;
@@ -102,7 +102,7 @@ void main () {
 
     testWidgets('forLongPress', (WidgetTester tester) async {
       final SemanticsTester semanticsTester = SemanticsTester(tester);
-      semanticEvents.clear();
+
       await tester.pumpWidget(TestWidget(
         longPressHandler: (BuildContext context) {
           return () => Feedback.forLongPress(context);
@@ -130,7 +130,6 @@ void main () {
 
     testWidgets('forLongPress Wrapper', (WidgetTester tester) async {
       final SemanticsTester semanticsTester = SemanticsTester(tester);
-      semanticEvents.clear();
       int callbackCount = 0;
       void callback() {
         callbackCount++;
diff --git a/packages/flutter_driver/test/src/real_tests/extension_test.dart b/packages/flutter_driver/test/src/real_tests/extension_test.dart
index 27f2a7c585..5ea6396571 100644
--- a/packages/flutter_driver/test/src/real_tests/extension_test.dart
+++ b/packages/flutter_driver/test/src/real_tests/extension_test.dart
@@ -280,7 +280,7 @@ void main() {
           'response': <String, dynamic>{},
         },
       );
-    }, semanticsEnabled: false); // Disabling semantics to prevent the unexpected message.
+    });
 
     testWidgets(
         'waiting for NoPendingPlatformMessages returns until a single method channel call returns', (WidgetTester tester) async {
@@ -313,7 +313,7 @@ void main() {
           'response': <String, dynamic>{},
         },
       );
-    }, semanticsEnabled: false); // Disabling semantics to prevent the unexpected message.
+    });
 
     testWidgets(
         'waiting for NoPendingPlatformMessages returns until both method channel calls return', (WidgetTester tester) async {
@@ -362,7 +362,7 @@ void main() {
           'response': <String, dynamic>{},
         },
       );
-    }, semanticsEnabled: false); // Disabling semantics to prevent the unexpected message.
+    });
 
     testWidgets(
         'waiting for NoPendingPlatformMessages returns until new method channel call returns', (WidgetTester tester) async {
@@ -413,7 +413,7 @@ void main() {
           'response': <String, dynamic>{},
         },
       );
-    }, semanticsEnabled: false); // Disabling semantics to prevent the unexpected message.
+    });
 
     testWidgets(
         'waiting for NoPendingPlatformMessages returns until both old and new method channel calls return', (WidgetTester tester) async {
@@ -463,7 +463,7 @@ void main() {
           'response': <String, dynamic>{},
         },
       );
-    }, semanticsEnabled: false); // Disabling semantics to prevent the unexpected message.
+    });
   });
 
   group('getSemanticsId', () {