pkg/mime: cleanup unused members in test

test/mime_multipart_transformer_test.dart

 // Copyright (c) 2013, 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:async';
 import 'dart:math';
 
 import "package:test/test.dart";
 import "package:mime/mime.dart";
 
 void _writeInChunks(
     List<int> data, int chunkSize, StreamController<List<int>> controller) {
   if (chunkSize == -1) chunkSize = data.length;
 
-  int written = 0;
   for (int pos = 0; pos < data.length; pos += chunkSize) {
     int remaining = data.length - pos;
     int writeLength = min(chunkSize, remaining);
     controller.add(data.sublist(pos, pos + writeLength));
-    written += writeLength;
   }
   controller.close();
 }
 
 enum TestMode { IMMEDIATE_LISTEN, DELAY_LISTEN, PAUSE_RESUME }
 
 void _runParseTest(String message, String boundary, TestMode mode,
     [List<Map> expectedHeaders, List expectedParts, bool expectError = false]) {
   Future testWrite(List<int> data, [int chunkSize = -1]) {
     StreamController controller = new StreamController(sync: true);
@@ skipping 60 matching lines @@
     return completer.future;
   }
 
   Future testFirstPartOnly(List<int> data, [int chunkSize = -1]) {
     var completer = new Completer();
     var controller = new StreamController(sync: true);
 
     var stream =
         controller.stream.transform(new MimeMultipartTransformer(boundary));
 
-    var subscription;
-    subscription = stream.first.then((multipart) {
+    stream.first.then((multipart) {
       if (expectedHeaders != null) {
         expect(multipart.headers, equals(expectedHeaders[0]));
       }
       return (multipart.fold([], (b, d) => b..addAll(d)).then((data) {
         if (expectedParts != null && expectedParts[0] != null) {
           expect(data, equals(expectedParts[0].codeUnits));
         }
       }));
     }).then((_) {
       completer.complete();
@@ skipping 334 matching lines @@
 \r
 Body2\r
 --xxx\r\n""";
   _testParse(message, "xxx", null, [null, null], true);
 }
 
 void main() {
   _testParseValid();
   _testParseInvalid();
 }