Remove library dart:crypto

pkg/crypto/lib/crypto.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.
 
 library dart.crypto;
 
 import 'dart:math';
 
-part 'crypto_utils.dart';
-part 'hash_utils.dart';
-part 'hmac.dart';
-part 'md5.dart';
-part 'sha1.dart';
-part 'sha256.dart';
+part 'src/crypto_utils.dart';
+part 'src/hash_utils.dart';
+part 'src/hmac.dart';
+part 'src/md5.dart';
+part 'src/sha1.dart';
+part 'src/sha256.dart';
 
 /**
  * Interface for cryptographic hash functions.
  *
  * The [add] method is used to add data to the hash. The [close] method
  * is used to extract the message digest.
  *
  * Once the [close] method has been called no more data can be added using the
  * [add] method. If [add] is called after the first call to [close] a
  * HashException is thrown.
@@ skipping 148 matching lines @@
 /**
  * HashExceptions are thrown on invalid use of a Hash
  * object.
  */
 class HashException {
   HashException(String this.message);
   toString() => "HashException: $message";
   String message;
 }