Remove unused dart:async imports (#470)
Since Dart 2.1, Future and Stream have been exported from dart:core
diff --git a/lib/http.dart b/lib/http.dart
index c7dc9bf..5539cfa 100644
--- a/lib/http.dart
+++ b/lib/http.dart
@@ -3,7 +3,6 @@
// BSD-style license that can be found in the LICENSE file.
/// A composable, [Future]-based library for making HTTP requests.
-import 'dart:async';
import 'dart:convert';
import 'dart:typed_data';
diff --git a/lib/src/base_client.dart b/lib/src/base_client.dart
index fa8169b..640afb8 100644
--- a/lib/src/base_client.dart
+++ b/lib/src/base_client.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:convert';
import 'dart:typed_data';
diff --git a/lib/src/base_request.dart b/lib/src/base_request.dart
index 544e436..93c545f 100644
--- a/lib/src/base_request.dart
+++ b/lib/src/base_request.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:collection';
import 'byte_stream.dart';
diff --git a/lib/src/client.dart b/lib/src/client.dart
index d877ce5..89b1b10 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:convert';
import 'dart:typed_data';
diff --git a/lib/src/mock_client.dart b/lib/src/mock_client.dart
index 45030ab..1daa559 100644
--- a/lib/src/mock_client.dart
+++ b/lib/src/mock_client.dart
@@ -2,8 +2,6 @@
// 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:async';
-
import 'base_client.dart';
import 'base_request.dart';
import 'byte_stream.dart';
diff --git a/lib/src/multipart_file.dart b/lib/src/multipart_file.dart
index 541664a..8e6642f 100644
--- a/lib/src/multipart_file.dart
+++ b/lib/src/multipart_file.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:convert';
import 'package:http_parser/http_parser.dart';
diff --git a/lib/src/multipart_file_io.dart b/lib/src/multipart_file_io.dart
index c5581e3..bffc394 100644
--- a/lib/src/multipart_file_io.dart
+++ b/lib/src/multipart_file_io.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:io';
import 'package:http_parser/http_parser.dart';
diff --git a/lib/src/multipart_file_stub.dart b/lib/src/multipart_file_stub.dart
index b230441..30ed036 100644
--- a/lib/src/multipart_file_stub.dart
+++ b/lib/src/multipart_file_stub.dart
@@ -2,8 +2,6 @@
// 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:async';
-
import 'package:http_parser/http_parser.dart';
import 'multipart_file.dart';
diff --git a/lib/src/multipart_request.dart b/lib/src/multipart_request.dart
index 4d89c6c..7e5469b 100644
--- a/lib/src/multipart_request.dart
+++ b/lib/src/multipart_request.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:convert';
import 'dart:math';
diff --git a/lib/src/response.dart b/lib/src/response.dart
index 36d9614..a88669e 100644
--- a/lib/src/response.dart
+++ b/lib/src/response.dart
@@ -2,7 +2,6 @@
// 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:async';
import 'dart:convert';
import 'dart:typed_data';
diff --git a/lib/src/streamed_response.dart b/lib/src/streamed_response.dart
index b5b073f..a11386e 100644
--- a/lib/src/streamed_response.dart
+++ b/lib/src/streamed_response.dart
@@ -2,8 +2,6 @@
// 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:async';
-
import 'base_request.dart';
import 'base_response.dart';
import 'byte_stream.dart';
