Remove deprecated APIs.

lib/src/hash.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:convert';
 
 import 'digest.dart';
 import 'digest_sink.dart';
 
 /// An interface for cryptographic hash functions.
 ///
 /// Every hash is a converter that takes a list of ints and returns a single
 /// digest. When used in chunked mode, it will only ever add one digest to the
 /// inner [Sink].
 abstract class Hash extends Converter<List<int>, Digest> {
   /// The internal block size of the hash in bytes.
   ///
-  /// This is exposed for use by the [HMAC] class, which needs to know the block
+  /// This is exposed for use by the [Hmac] class, which needs to know the block
   /// size for the [Hash] it uses.
   int get blockSize;
 
-  /// The sink for implementing the deprecated APIs that involved adding data
-  /// directly to the [Hash] instance.
-  ByteConversionSink _sink;
-
-  /// The sink that [_sink] sends the [Digest] to once it finishes hashing.
-  final DigestSink _innerSink = new DigestSink();
-
-  Hash() {
-    _sink = startChunkedConversion(_innerSink);
-  }
+  const Hash();
 
   Digest convert(List<int> data) {
     var innerSink = new DigestSink();
     var outerSink = startChunkedConversion(innerSink);
     outerSink.add(data);
     outerSink.close();
     return innerSink.value;
   }
 
   ByteConversionSink startChunkedConversion(Sink<Digest> sink);
-
-  /// This is deprecated.
-  ///
-  /// Use [startChunkedConversion] instead.
-  @Deprecated("Will be removed in crypto 1.0.0.")
-  Hash newInstance();
-
-  /// This is deprecated.
-  ///
-  /// Use [convert] or [startChunkedConversion] instead.
-  @Deprecated("Will be removed in crypto 1.0.0.")
-  void add(List<int> data) => _sink.add(data);
-
-  /// This is deprecated.
-  ///
-  /// Use [convert] or [startChunkedConversion] instead.
-  @Deprecated("Will be removed in crypto 1.0.0.")
-  List<int> close() {
-    _sink.close();
-    return _innerSink.value.bytes;
-  }
 }