Remove the non-driver versions of several tests

pkg/analysis_server/test/services/refactoring/extract_method_test.dart

Index: pkg/analysis_server/test/services/refactoring/extract_method_test.dart
diff --git a/pkg/analysis_server/test/services/refactoring/extract_method_test.dart b/pkg/analysis_server/test/services/refactoring/extract_method_test.dart
index b8adda4212aa50a131907d640295faaa092d7312..1622dc6811d13d0e0a5e0346a35bf3a96ae6481c 100644
--- a/pkg/analysis_server/test/services/refactoring/extract_method_test.dart
+++ b/pkg/analysis_server/test/services/refactoring/extract_method_test.dart
@@ -16,7 +16,6 @@ import 'abstract_refactoring.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ExtractMethodTest);
-    defineReflectiveTests(ExtractMethodTest_Driver);
   });
 }
 
@@ -24,6 +23,9 @@ main() {
 class ExtractMethodTest extends RefactoringTest {
   ExtractMethodRefactoringImpl refactoring;
 
+  @override
+  bool get enableNewAnalysisDriver => true;
+
   test_bad_assignmentLeftHandSide() async {
     await indexTestUnit('''
 main() {
@@ -2841,9 +2843,3 @@ Future<int> newFuture() => null;
     }).toList();
   }
 }
-
-@reflectiveTest
-class ExtractMethodTest_Driver extends ExtractMethodTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}