Remove deprecated mappedBy.

sdk/lib/async/stream.dart

 // Copyright (c) 2012, 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.async;
 
 // -------------------------------------------------------------------
 // Core Stream types
 // -------------------------------------------------------------------
 
@@ skipping 116 matching lines @@
 
   /**
    * Create a new stream that converts each element of this stream
    * to a new value using the [convert] function.
    */
   Stream map(convert(T event)) {
     return new _MapStream<T, dynamic>(this, convert);
   }
 
   /**
-   * Deprecated alias for [map].
-   *
-   * @deprecated
-   */
-  Stream mappedBy(f(T element)) => map(f);
-
-  /**
    * Create a wrapper Stream that intercepts some errors from this stream.
    *
    * If this stream sends an error that matches [test], then it is intercepted
    * by the [handle] function.
    *
    * An [AsyncError] [:e:] is matched by a test function if [:test(e):] returns
    * true. If [test] is omitted, every error is considered matching.
    *
    * If the error is intercepted, the [handle] function can decide what to do
    * with it. It can throw if it wants to raise a new (or the same) error,
@@ skipping 957 matching lines @@
 }
 
 class _StreamOutputSinkWrapper<T> implements StreamSink<T> {
   _StreamOutputSink _sink;
   _StreamOutputSinkWrapper(this._sink);
 
   void add(T data) => _sink._sendData(data);
   void signalError(AsyncError error) => _sink._sendError(error);
   void close() => _sink._sendDone();
 }