Remove unused libraries.

lib/src/copy/io_sink.dart

Index: lib/src/copy/io_sink.dart
diff --git a/lib/src/copy/io_sink.dart b/lib/src/copy/io_sink.dart
deleted file mode 100644
index 0578bdb03babbde31fdec30f9b96f6c8d4caea6e..0000000000000000000000000000000000000000
--- a/lib/src/copy/io_sink.dart
+++ /dev/null
@@ -1,145 +0,0 @@
-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// The following code is copied from sdk/lib/io/io_sink.dart. The "dart:io"
-// implementation isn't used directly to support non-"dart:io" applications.
-//
-// Because it's copied directly, only modifications necessary to support the
-// desired public API and to remove "dart:io" dependencies have been made.
-//
-// This is up-to-date as of sdk revision
-// 86227840d75d974feb238f8b3c59c038b99c05cf.
-import 'dart:async';
-
-class StreamSinkImpl<T> implements StreamSink<T> {
-  final StreamConsumer<T> _target;
-  Completer _doneCompleter = new Completer();
-  Future _doneFuture;
-  StreamController<T> _controllerInstance;
-  Completer _controllerCompleter;
-  bool _isClosed = false;
-  bool _isBound = false;
-  bool _hasError = false;
-
-  StreamSinkImpl(this._target) {
-    _doneFuture = _doneCompleter.future;
-  }
-
-  void add(T data) {
-    if (_isClosed) return;
-    _controller.add(data);
-  }
-
-  void addError(error, [StackTrace stackTrace]) {
-    _controller.addError(error, stackTrace);
-  }
-
-  Future addStream(Stream<T> stream) {
-    if (_isBound) {
-      throw new StateError("StreamSink is already bound to a stream");
-    }
-    _isBound = true;
-    if (_hasError) return done;
-    // Wait for any sync operations to complete.
-    Future targetAddStream() {
-      return _target.addStream(stream)
-          .whenComplete(() {
-            _isBound = false;
-          });
-    }
-    if (_controllerInstance == null) return targetAddStream();
-    var future = _controllerCompleter.future;
-    _controllerInstance.close();
-    return future.then((_) => targetAddStream());
-  }
-
-  Future flush() {
-    if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
-    }
-    if (_controllerInstance == null) return new Future.value(this);
-    // Adding an empty stream-controller will return a future that will complete
-    // when all data is done.
-    _isBound = true;
-    var future = _controllerCompleter.future;
-    _controllerInstance.close();
-    return future.whenComplete(() {
-          _isBound = false;
-        });
-  }
-
-  Future close() {
-    if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
-    }
-    if (!_isClosed) {
-      _isClosed = true;
-      if (_controllerInstance != null) {
-        _controllerInstance.close();
-      } else {
-        _closeTarget();
-      }
-    }
-    return done;
-  }
-
-  void _closeTarget() {
-    _target.close().then(_completeDoneValue, onError: _completeDoneError);
-  }
-
-  Future get done => _doneFuture;
-
-  void _completeDoneValue(value) {
-    if (_doneCompleter == null) return;
-    _doneCompleter.complete(value);
-    _doneCompleter = null;
-  }
-
-  void _completeDoneError(error, StackTrace stackTrace) {
-    if (_doneCompleter == null) return;
-    _hasError = true;
-    _doneCompleter.completeError(error, stackTrace);
-    _doneCompleter = null;
-  }
-
-  StreamController<T> get _controller {
-    if (_isBound) {
-      throw new StateError("StreamSink is bound to a stream");
-    }
-    if (_isClosed) {
-      throw new StateError("StreamSink is closed");
-    }
-    if (_controllerInstance == null) {
-      _controllerInstance = new StreamController<T>(sync: true);
-      _controllerCompleter = new Completer();
-      _target.addStream(_controller.stream)
-          .then(
-              (_) {
-                if (_isBound) {
-                  // A new stream takes over - forward values to that stream.
-                  _controllerCompleter.complete(this);
-                  _controllerCompleter = null;
-                  _controllerInstance = null;
-                } else {
-                  // No new stream, .close was called. Close _target.
-                  _closeTarget();
-                }
-              },
-              onError: (error, stackTrace) {
-                if (_isBound) {
-                  // A new stream takes over - forward errors to that stream.
-                  _controllerCompleter.completeError(error, stackTrace);
-                  _controllerCompleter = null;
-                  _controllerInstance = null;
-                } else {
-                  // No new stream. No need to close target, as it have already
-                  // failed.
-                  _completeDoneError(error, stackTrace);
-                }
-              });
-    }
-    return _controllerInstance;
-  }
-}
-