Make the analysis server integration tests driver only.

pkg/analysis_server/test/integration/analysis/package_root_test.dart

Index: pkg/analysis_server/test/integration/analysis/package_root_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/package_root_test.dart b/pkg/analysis_server/test/integration/analysis/package_root_test.dart
index f5a2cfd63214cf765b1bfff12d72f7dc200bb1e4..29f61a9d03feae4e831c0ea68690ac0a1442b519 100644
--- a/pkg/analysis_server/test/integration/analysis/package_root_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/package_root_test.dart
@@ -12,12 +12,11 @@ import '../integration_tests.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(SetAnalysisRootsTest);
-    defineReflectiveTests(SetAnalysisRootsTest_Driver);
   });
 }
 
-class AbstractSetAnalysisRootsTest
-    extends AbstractAnalysisServerIntegrationTest {
+@reflectiveTest
+class SetAnalysisRootsTest extends AbstractAnalysisServerIntegrationTest {
   test_package_root() {
     String projPath = sourcePath('project');
     String mainPath = path.join(projPath, 'main.dart');
@@ -77,12 +76,3 @@ f() {}
     });
   }
 }
-
-@reflectiveTest
-class SetAnalysisRootsTest extends AbstractSetAnalysisRootsTest {}
-
-@reflectiveTest
-class SetAnalysisRootsTest_Driver extends AbstractSetAnalysisRootsTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}