tools: removed unused members, tiny cleanup

tools/testing/dart/multitest.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 multitest;
 
 import "dart:async";
 import "dart:io";
 import "test_suite.dart";
 import "utils.dart";
@@ skipping 265 matching lines @@
              hasStaticWarning: hasStaticWarning,
              multitestKey: key);
     }
 
     return null;
   });
 }
 
 
 Path CreateMultitestDirectory(String outputDir, Path suiteDir) {
-  final String generatedTestDirectory = 'generated_tests';
   Directory generatedTestDir = new Directory('$outputDir/generated_tests');
   if (!new Directory(outputDir).existsSync()) {
     new Directory(outputDir).createSync();
   }
   if (!generatedTestDir.existsSync()) {
     generatedTestDir.createSync();
   }
   var split = suiteDir.segments();
   if (split.last == 'src') {
     // TODO(sigmund): remove this once all tests are migrated to use
     // TestSuite.forDirectory.
     split.removeLast();
   }
   String path = '${generatedTestDir.path}/${split.last}';
   Directory dir = new Directory(path);
   if (!dir.existsSync()) {
     dir.createSync();
   }
   return new Path(new File(path).absolute.path);
 }