Remove the "pkgbuild" step on the bots.

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 a2c23a24e1bbba42c158ac7d912d700bb21af153..45a2eb2235281864fd0d95dc6cde287f7185d32e 100644
--- a/tools/testing/dart/test_configurations.dart
+++ b/tools/testing/dart/test_configurations.dart
@@ -209,16 +209,6 @@ Future testConfigurations(List<Map> configurations) async {
           if (key == 'analyze_library') {
             testSuites.add(new AnalyzeLibraryTestSuite(conf));
           }
-        } else if (conf['compiler'] == 'none' &&
-            conf['runtime'] == 'vm' &&
-            key == 'pkgbuild') {
-          if (!conf['use_sdk']) {
-            print("Running the 'pkgbuild' test suite requires "
-                "passing the '--use-sdk' to test.py");
-            exit(1);
-          }
-          testSuites.add(
-              new PkgBuildTestSuite(conf, 'pkgbuild', 'pkg/pkgbuild.status'));
         }
       }
     }