remove generated_sdk from checked in code

test/generated_sdk/lib/convert/chunked_conversion.dart

-// Copyright (c) 2013, 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.
-
-part of dart.convert;
-
-typedef void _ChunkedConversionCallback<T>(T accumulated);
-
-/**
- * A [ChunkedConversionSink] is used to transmit data more efficiently between
- * two converters during chunked conversions.
- *
- * The basic `ChunkedConversionSink` is just a [Sink], and converters should
- * work with a plain `Sink`, but may work more efficiently with certain
- * specialized types of `ChunkedConversionSink`.
- *
- * It is recommended that implementations of `ChunkedConversionSink` extends
- * this class, to inherit any further methods that may be added to the class.
- */
-abstract class ChunkedConversionSink<T> implements Sink<T> {
-  ChunkedConversionSink();
-  factory ChunkedConversionSink.withCallback(
-      void callback(List<T> accumulated)) = _SimpleCallbackSink;
-
-  /**
-   * Adds chunked data to this sink.
-   *
-   * This method is also used when converters are used as [StreamTransformer]s.
-   */
-  void add(T chunk);
-
-  /**
-   * Closes the sink.
-   *
-   * This signals the end of the chunked conversion. This method is called
-   * when converters are used as [StreamTransformer]'s.
-   */
-  void close();
-}
-
-/**
- * This class accumulates all chunks and invokes a callback with a list of
- * the chunks when the sink is closed.
- *
- * This class can be used to terminate a chunked conversion.
- */
-class _SimpleCallbackSink<T> extends ChunkedConversionSink<T> {
-  final _ChunkedConversionCallback<List<T>> _callback;
-  final List<T> _accumulated = <T>[];
-
-  _SimpleCallbackSink(this._callback);
-
-  void add(T chunk) { _accumulated.add(chunk); }
-  void close() { _callback(_accumulated); }
-}
-
-class _EventSinkAdapter<T> implements ChunkedConversionSink<T> {
-  final EventSink<T> _sink;
-
-  _EventSinkAdapter(this._sink);
-
-  void add(T data) => _sink.add(data);
-  void close() => _sink.close();
-}
-
-/**
- * This class converts implements the logic for a chunked conversion as a
- * stream transformer.
- *
- * It is used as strategy in the [EventTransformStream].
- *
- * It also implements the [ChunkedConversionSink] interface so that it
- * can be used as output sink in a chunked conversion.
- */
-class _ConverterStreamEventSink<S, T> implements EventSink<S> {
-  /** The output sink for the converter. */
-  final EventSink<T> _eventSink;
-
-  /**
-   * The input sink for new data. All data that is received with
-   * [handleData] is added into this sink.
-   */
-  ChunkedConversionSink _chunkedSink;
-
-  _ConverterStreamEventSink(Converter converter, EventSink<T> sink)
-      : this._eventSink = sink,
-        _chunkedSink = converter.startChunkedConversion(sink);
-
-  void add(S o) => _chunkedSink.add(o);
-  void addError(Object error, [StackTrace stackTrace]) {
-    _eventSink.addError(error, stackTrace);
-  }
-  void close() => _chunkedSink.close();
-}