Remove deprecated StringBuffer.add, addAll and addCharCode.

sdk/lib/core/string_buffer.dart

 // Copyright (c) 2011, 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.core;
 
 /**
  * The StringBuffer class is useful for concatenating strings
  * efficiently. Only on a call to [toString] are the strings
  * concatenated to a single String.
  */
 class StringBuffer implements StringSink {
 
   /** Creates the string buffer with an initial content. */
   external StringBuffer([Object content = ""]);
 
   /**
    * Returns the length of the content that has been accumulated so far.
    * This is a constant-time operation.
    */
   external int get length;
 
   /** Returns whether the buffer is empty. This is a constant-time operation. */
   bool get isEmpty => length == 0;
 
-  /**
-   * Converts [obj] to a string and adds it to the buffer.
-   *
-   * *Deprecated*. Use [write] instead.
-   */
-  @deprecated
-  void add(Object obj) => write(obj);
-
   external void write(Object obj);
 
   void writeAll(Iterable objects) {
     for (Object obj in objects) write(obj);
   }
 
   void writeln(Object obj) {
     write(obj);
     write("\n");
   }
 
-  /**
-   * Adds the string representation of [charCode] to the buffer.
-   *
-   * *Deprecated* Use [writeCharCode] instead.
-   */
-  @deprecated
-  void addCharCode(int charCode) {
-    writeCharCode(charCode);
-  }
-
   /// Adds the string representation of [charCode] to the buffer.
   void writeCharCode(int charCode) {
     write(new String.fromCharCode(charCode));
   }
 
   /**
-   * Adds all items in [objects] to the buffer.
-   *
-   * *Deprecated*. Use [writeAll] instead.
-   */
-  @deprecated
-  void addAll(Iterable objects) {
-    for (Object obj in objects) write(obj);
-  }
-
-  /**
    * Clears the string buffer.
    *
    * *Deprecated*.
    */
   @deprecated
   external void clear();
 
   /// Returns the contents of buffer as a concatenated string.
   external String toString();
 }