Remove the non-driver versions of several tests

pkg/analysis_server/test/services/refactoring/extract_method_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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/extract_method.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'abstract_refactoring.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ExtractMethodTest);
-    defineReflectiveTests(ExtractMethodTest_Driver);
   });
 }
 
 @reflectiveTest
 class ExtractMethodTest extends RefactoringTest {
   ExtractMethodRefactoringImpl refactoring;
 
+  @override
+  bool get enableNewAnalysisDriver => true;
+
   test_bad_assignmentLeftHandSide() async {
     await indexTestUnit('''
 main() {
   int aaa;
   aaa = 0;
 }
 ''');
     _createRefactoringForString('aaa ');
     return _assertConditionsFatal(
         'Cannot extract the left-hand side of an assignment.');
@@ skipping 2797 matching lines @@
    * Returns a deep copy of [refactoring] parameters.
    * There was a bug masked by updating parameter instances shared between the
    * refactoring and the test.
    */
   List<RefactoringMethodParameter> _getParametersCopy() {
     return refactoring.parameters.map((p) {
       return new RefactoringMethodParameter(p.kind, p.type, p.name, id: p.id);
     }).toList();
   }
 }
-
-@reflectiveTest
-class ExtractMethodTest_Driver extends ExtractMethodTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}