Remove unused imports to make the analyzer happy

packages/flutter/bin/init.dart

@@ -2,12 +2,5 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-/*
-* This script should be invoked via 'pub run' after 'pub get':
-* $ pub run sky:init
-*/
-
-import 'dart:io';
-
 main(List<String> arguments) {
 }

packages/flutter/lib/widgets/drawer.dart

@@ -11,7 +11,6 @@ import 'package:sky/animation/forces.dart';
 import 'package:sky/theme/shadows.dart';
 import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/widgets/animated_container.dart';
-import 'package:sky/widgets/animation_intentions.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/navigator.dart';
 import 'package:sky/widgets/scrollable.dart';

packages/flutter/lib/widgets/navigator.dart

@@ -8,11 +8,9 @@ import 'package:sky/animation/animated_value.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/animation/curves.dart';
 import 'package:sky/animation/forces.dart';
-import 'package:sky/widgets/animated_component.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/focus.dart';
 import 'package:sky/widgets/transitions.dart';
-import 'package:vector_math/vector_math.dart';
 
 typedef Widget RouteBuilder(Navigator navigator, RouteBase route);
 

packages/flutter/lib/widgets/snack_bar.dart

@@ -8,7 +8,6 @@ import 'package:sky/animation/animated_value.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/painting/text_style.dart';
 import 'package:sky/theme/typography.dart' as typography;
-import 'package:sky/widgets/animated_container.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/default_text_style.dart';
 import 'package:sky/widgets/material.dart';

packages/flutter/lib/widgets/transitions.dart

@@ -5,7 +5,6 @@
 import 'package:sky/widgets/animated_component.dart';
 import 'package:sky/animation/animation_performance.dart';
 import 'package:sky/animation/animated_value.dart';
-import 'package:sky/widgets/animated_component.dart';
 import 'package:sky/widgets/basic.dart';
 import 'package:vector_math/vector_math.dart';