Remove the non-driver versions of several tests

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

Index: pkg/analysis_server/test/services/completion/dart/named_constructor_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/named_constructor_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/named_constructor_contributor_test.dart
index 5e6dff6be078420692c1d2d0c34662fb0356f39f..9b6f9c238b18910b4e780b7dcb604156b0c734d6 100644
--- a/pkg/analysis_server/test/services/completion/dart/named_constructor_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/named_constructor_contributor_test.dart
@@ -14,12 +14,14 @@ import 'completion_contributor_util.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(NamedConstructorContributorTest);
-    defineReflectiveTests(NamedConstructorContributorTest_Driver);
   });
 }
 
 @reflectiveTest
 class NamedConstructorContributorTest extends DartCompletionContributorTest {
+  @override
+  bool get enableNewAnalysisDriver => true;
+
   CompletionSuggestion assertSuggestNamedConstructor(
       String name, String returnType,
       [int relevance = DART_RELEVANCE_DEFAULT,
@@ -183,10 +185,3 @@ class NamedConstructorContributorTest extends DartCompletionContributorTest {
     assertNotSuggested('m');
   }
 }
-
-@reflectiveTest
-class NamedConstructorContributorTest_Driver
-    extends NamedConstructorContributorTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}