Remove unused option in server API

pkg/analysis_server/test/test_all.dart

Index: pkg/analysis_server/test/test_all.dart
diff --git a/pkg/analysis_server/test/test_all.dart b/pkg/analysis_server/test/test_all.dart
index e830864d074be011e1261fa1f58b7cb5a291687e..4f4ee7202ba743214b4b60d310eb57f42be60f92 100644
--- a/pkg/analysis_server/test/test_all.dart
+++ b/pkg/analysis_server/test/test_all.dart
@@ -24,7 +24,6 @@ import 'server_options_test.dart' as server_options;
 import 'services/test_all.dart' as services_all;
 import 'single_context_manager_test.dart' as single_context_manager_test;
 import 'socket_server_test.dart' as socket_server_test;
-import 'source/test_all.dart' as source_all;
 import 'src/test_all.dart' as src_all;
 import 'utils.dart';
 
@@ -54,7 +53,6 @@ main() {
     services_all.main();
     single_context_manager_test.main();
     socket_server_test.main();
-    source_all.main();
     src_all.main();
   });
 }