Get rid of --use-repository-packages and --use-public-packages.

tools/testing/dart/test_configurations.dart

Index: tools/testing/dart/test_configurations.dart
diff --git a/tools/testing/dart/test_configurations.dart b/tools/testing/dart/test_configurations.dart
index ee68349e3bc6b38ffa434ce9879caa3a80b55bf7..9418bd7d083c2ad0593f82aa16c933cef96cc967 100644
--- a/tools/testing/dart/test_configurations.dart
+++ b/tools/testing/dart/test_configurations.dart
@@ -208,12 +208,6 @@ Future testConfigurations(List<Map> configurations) async {
         } else if (conf['compiler'] == 'none' &&
             conf['runtime'] == 'vm' &&
             key == 'pkgbuild') {
-          if (!conf['use_repository_packages'] &&
-              !conf['use_public_packages']) {
-            print("You need to use either --use-repository-packages or "
-                "--use-public-packages with the pkgbuild test suite!");
-            exit(1);
-          }
           if (!conf['use_sdk']) {
             print("Running the 'pkgbuild' test suite requires "
                 "passing the '--use-sdk' to test.py");