Remove ByteStream (#84)

Author: donny-dont

lib/http.dart

@@ -11,7 +11,6 @@ import 'src/client.dart';
 import 'src/response.dart';
 
 export 'src/base_client.dart';
-export 'src/byte_stream.dart';
 export 'src/client.dart';
 export 'src/exception.dart';
 export 'src/io_client.dart';

lib/src/byte_stream.dart

@@ -8,7 +8,6 @@ import 'dart:typed_data';
 
 import 'package:collection/collection.dart';
 
-import 'byte_stream.dart';
 import 'http_unmodifiable_map.dart';
 
 /// Returns a [Map] with the values from [original] and the values from
@@ -93,13 +92,6 @@ Uint8List toUint8List(List<int> input) {
   return new Uint8List.fromList(input);
 }
 
-/// If [stream] is already a [ByteStream], returns it. Otherwise, wraps it in a
-/// [ByteStream].
-ByteStream toByteStream(Stream<List<int>> stream) {
-  if (stream is ByteStream) return stream;
-  return new ByteStream(stream);
-}
-
 /// Calls [onDone] once [stream] (a single-subscription [Stream]) is finished.
 /// The return value, also a single-subscription [Stream] should be used in
 /// place of [stream] after calling this method.