Get rid of all the library tags.

lib/src/multipart_file.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 multipart_file;
-
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:http_parser/http_parser.dart';
 import 'package:path/path.dart' as path;
 
 import 'byte_stream.dart';
 import 'io.dart' as io;
 import 'utils.dart';
 
@@ skipping 87 matching lines @@
   // [MultipartRequest]. This returns a [ByteStream] that should emit the body
   // of the file. The stream may be closed to indicate an empty file.
   ByteStream finalize() {
     if (isFinalized) {
       throw new StateError("Can't finalize a finalized MultipartFile.");
     }
     _isFinalized = true;
     return _stream;
   }
 }