Fix 'Unused local variable' hints in analyzer and analysis_server.

pkg/analysis_server/test/edit/refactoring_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 test.edit.refactoring;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/protocol.dart';
@@ skipping 1190 matching lines @@
 
   test_constructor_fromInstanceCreation() {
     addTestFile('''
 class A {
   A.test() {}
 }
 main() {
   new A.test();
 }
 ''');
-    String search = 'test();';
-    String newName = 'newName';
     return assertSuccessfulRefactoring(() {
       return sendRenameRequest('test();', 'newName');
     }, '''
 class A {
   A.newName() {}
 }
 main() {
   new A.newName();
 }
 ''');
@@ skipping 321 matching lines @@
   }
 
   @override
   void setUp() {
     super.setUp();
     server.handlers = [new EditDomainHandler(server),];
     createProject();
     handler = new EditDomainHandler(server);
   }
 }