remove generated_sdk from checked in code

test/generated_sdk/lib/convert/encoding.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;
-
-/**
- * Open-ended Encoding enum.
- */
-abstract class Encoding extends Codec<String, List<int>> {
-  const Encoding();
-
-  Future<String> decodeStream(Stream<List<int>> byteStream) {
-    return byteStream
-      .transform(decoder)
-      .fold(new StringBuffer(), (buffer, string) => buffer..write(string))
-      .then((buffer) => buffer.toString());
-  }
-
-  /**
-   * Name of the encoding.
-   *
-   * If the encoding is standardized, this is the lower-case version of one of
-   * the IANA official names for the character set (see
-   * http://www.iana.org/assignments/character-sets/character-sets.xml)
-   */
-  String get name;
-
-  // All aliases (in lowercase) of supported encoding from
-  // http://www.iana.org/assignments/character-sets/character-sets.xml.
-  static Map<String, Encoding> _nameToEncoding = <String, Encoding> {
-    // ISO_8859-1:1987.
-    "iso_8859-1:1987": LATIN1,
-    "iso-ir-100": LATIN1,
-    "iso_8859-1": LATIN1,
-    "iso-8859-1": LATIN1,
-    "latin1": LATIN1,
-    "l1": LATIN1,
-    "ibm819": LATIN1,
-    "cp819": LATIN1,
-    "csisolatin1": LATIN1,
-
-    // US-ASCII.
-    "iso-ir-6": ASCII,
-    "ansi_x3.4-1968": ASCII,
-    "ansi_x3.4-1986": ASCII,
-    "iso_646.irv:1991": ASCII,
-    "iso646-us": ASCII,
-    "us-ascii": ASCII,
-    "us": ASCII,
-    "ibm367": ASCII,
-    "cp367": ASCII,
-    "csascii": ASCII,
-    "ascii": ASCII,  // This is not in the IANA official names.
-
-    // UTF-8.
-    "csutf8": UTF8,
-    "utf-8": UTF8
-  };
-
-  /**
-  * Gets an [Encoding] object from the name of the character set
-  * name. The names used are the IANA official names for the
-  * character set (see
-  * http://www.iana.org/assignments/character-sets/character-sets.xml).
-  *
-  * The [name] passed is case insensitive.
-  *
-  * If character set is not supported [:null:] is returned.
-  */
-  static Encoding getByName(String name) {
-      if (name == null) return null;
-      name = name.toLowerCase();
-      return _nameToEncoding[name];
-  }
-}