Remove the non-driver versions of several tests

pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart
index fa7529fd3c6ab3cdd1e5670ada5d4d9dd0c0466b..45ff7c61e58839c84d9ad4b600a0ccd257d96691 100644
--- a/pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/static_member_contributor_test.dart
@@ -14,13 +14,15 @@ import 'completion_contributor_util.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(StaticMemberContributorTest);
-    defineReflectiveTests(StaticMemberContributorTest_Driver);
   });
 }
 
 @reflectiveTest
 class StaticMemberContributorTest extends DartCompletionContributorTest {
   @override
+  bool get enableNewAnalysisDriver => true;
+
+  @override
   DartCompletionContributor createContributor() {
     return new StaticMemberContributor();
   }
@@ -288,9 +290,3 @@ void main() {async.Future.^.w()}''');
     assertNotSuggested('==');
   }
 }
-
-@reflectiveTest
-class StaticMemberContributorTest_Driver extends StaticMemberContributorTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}