Remove the non-driver versions of several tests

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

Index: pkg/analysis_server/test/services/completion/dart/local_library_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/local_library_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/local_library_contributor_test.dart
index 6a49e954b9abaf7c4f8db7ba87cac7b5096d0be0..308585b3664d3116d7af1ef54c944088a38811d6 100644
--- a/pkg/analysis_server/test/services/completion/dart/local_library_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/local_library_contributor_test.dart
@@ -14,13 +14,15 @@ import 'completion_contributor_util.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(LocalLibraryContributorTest);
-    defineReflectiveTests(LocalLibraryContributorTest_Driver);
   });
 }
 
 @reflectiveTest
 class LocalLibraryContributorTest extends DartCompletionContributorTest {
   @override
+  bool get enableNewAnalysisDriver => true;
+
+  @override
   DartCompletionContributor createContributor() {
     return new LocalLibraryContributor();
   }
@@ -307,9 +309,3 @@ class LocalLibraryContributorTest extends DartCompletionContributorTest {
     assertNotSuggested('m');
   }
 }
-
-@reflectiveTest
-class LocalLibraryContributorTest_Driver extends LocalLibraryContributorTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}