Clean up warnings and hints

pkg/analyzer_cli/test/utils.dart

 // Copyright (c) 2015, 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 analyzer_cli.test.utils;
 
 import 'dart:io';
 import 'dart:mirrors';
 
 import 'package:analyzer/analyzer.dart';
-import 'package:analyzer/src/generated/java_io.dart';
 import 'package:path/path.dart' as pathos;
-import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 /// Gets the test directory in a way that works with
 /// package:test and package:unittest.
 /// See <https://github.com/dart-lang/test/issues/110> for more info.
 final String testDirectory = pathos.dirname(
     pathos.fromUri((reflectClass(_TestUtils).owner as LibraryMirror).uri));
 
 /// Returns the string representation of the [AnalyzerErrorGroup] thrown when
 /// parsing [contents] as a Dart file. If [contents] doesn't throw any errors,
@@ skipping 31 matching lines @@
 dynamic withTempDir(fn(String path)) {
   var tempDir = Directory.systemTemp.createTempSync('analyzer_').path;
   try {
     return fn(tempDir);
   } finally {
     new Directory(tempDir).deleteSync(recursive: true);
   }
 }
 
 class _TestUtils {}