Unused import cleanup.

pkg/analyzer/test/generated/java_io_test.dart

 // Copyright (c) 2014, 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 engine.java_io_test;
 
-import 'dart:io';
-
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:unittest/unittest.dart';
 
 import '../utils.dart';
 
 main() {
   initializeTestEnvironment();
   group('JavaFile', () {
     group('toURI', () {
       test('forAbsolute', () {
@@ skipping 17 matching lines @@
         // it may be not on Windows, if "temp" is on other disk.
         String relPath = JavaFile.pathContext.relative(path);
         // test that toURI() returns an absolute URI
         Uri uri = new JavaFile(relPath).toURI();
         expect(uri.isAbsolute, isTrue);
         expect(uri.scheme, 'file');
       });
     });
   });
 }