Delete AnimatedComponent

This class has no clients.

packages/flutter/lib/src/widgets/animated_component.dart

-// Copyright 2015 The Chromium 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:sky/animation.dart';
-import 'package:sky/src/widgets/framework.dart';
-
-abstract class AnimatedComponent extends StatefulComponent {
-  const AnimatedComponent({ Key key, this.direction, this.duration }) : super(key: key);
-
-  final Duration duration;
-  final AnimationDirection direction;
-}
-
-abstract class AnimatedState<T extends AnimatedComponent> extends State<T> {
-  void initState() {
-    super.initState();
-    _performance = new Performance(duration: config.duration);
-    performance.addStatusListener(_handleAnimationStatusChanged);
-    if (buildDependsOnPerformance) {
-      performance.addListener(() {
-        setState(() {
-          // We don't actually have any state to change, per se,
-          // we just know that we have in fact changed state.
-        });
-      });
-    }
-    performance.play(config.direction);
-  }
-
-  void didUpdateConfig(T oldConfig) {
-    performance.duration = config.duration;
-    if (config.duration != oldConfig.duration || config.direction != oldConfig.direction)
-      performance.play(config.direction);
-  }
-
-  Performance get performance => _performance;
-  Performance _performance;
-
-  void _handleAnimationStatusChanged(PerformanceStatus status) {
-    if (status == PerformanceStatus.completed)
-      handleCompleted();
-    else if (status == PerformanceStatus.dismissed)
-      handleDismissed();
-  }
-
-  bool get buildDependsOnPerformance => false;
-  void handleCompleted() { }
-  void handleDismissed() { }
-}

packages/flutter/lib/widgets.dart

@@ -5,7 +5,6 @@
 /// The Flutter widget framework.
 library widgets;
 
-export 'src/widgets/animated_component.dart';
 export 'src/widgets/animated_container.dart';
 export 'src/widgets/app.dart';
 export 'src/widgets/basic.dart';