Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/global/run/runs_script_test.dart

Index: sdk/lib/_internal/pub_generated/test/global/run/runs_script_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/run/runs_script_test.dart b/sdk/lib/_internal/pub_generated/test/global/run/runs_script_test.dart
similarity index 77%
copy from sdk/lib/_internal/pub/test/global/run/runs_script_test.dart
copy to sdk/lib/_internal/pub_generated/test/global/run/runs_script_test.dart
index bfd8bcbffbd242d8dbea10fea0b8ba706bd4d9d7..3d9f35cb42df25128aee1dd25f5f8bf491e06e7c 100644
--- a/sdk/lib/_internal/pub/test/global/run/runs_script_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/global/run/runs_script_test.dart
@@ -9,11 +9,11 @@ main() {
   initConfig();
   integration('runs a script in an activated package', () {
     servePackages((builder) {
-      builder.serve("foo", "1.0.0", contents: [
-        d.dir("bin", [
-          d.file("script.dart", "main(args) => print('ok');")
-        ])
-      ]);
+      builder.serve(
+          "foo",
+          "1.0.0",
+          contents: [
+              d.dir("bin", [d.file("script.dart", "main(args) => print('ok');")])]);
     });
 
     schedulePub(args: ["global", "activate", "foo"]);