Fix analyzer hints and warnings in test/.

test/transcript_test.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 version_test;
 
 import 'package:pub/src/transcript.dart';
 import 'package:test/test.dart';
 
-import 'test_pub.dart';
-
 main() {
   test("discards from the middle once it reaches the maximum", () {
     var transcript = new Transcript<String>(4);
     forEachToString() {
       var result = "";
       transcript.forEach((entry) => result += entry, (n) => result += "[$n]");
       return result;
     }
 
     expect(forEachToString(), equals(""));
@@ skipping 28 matching lines @@
     expect(forEachToString(), equals("abc"));
     transcript.add("d");
     expect(forEachToString(), equals("abcd"));
     transcript.add("e");
     expect(forEachToString(), equals("abcde"));
     transcript.add("f");
     expect(forEachToString(), equals("abcdef"));
   });
 
 }