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

sdk/lib/_internal/pub_generated/test/validator/pubspec_field_test.dart

Index: sdk/lib/_internal/pub_generated/test/validator/pubspec_field_test.dart
diff --git a/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart b/sdk/lib/_internal/pub_generated/test/validator/pubspec_field_test.dart
similarity index 94%
copy from sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
copy to sdk/lib/_internal/pub_generated/test/validator/pubspec_field_test.dart
index 4f0f33ec9501b67528b2416692ed35d1c243a81c..0d0c8b91c1f61ae4232592c02ddfdc9d34c4725e 100644
--- a/sdk/lib/_internal/pub/test/validator/pubspec_field_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/validator/pubspec_field_test.dart
@@ -12,7 +12,7 @@ import '../test_pub.dart';
 import 'utils.dart';
 
 Validator pubspecField(Entrypoint entrypoint) =>
-  new PubspecFieldValidator(entrypoint);
+    new PubspecFieldValidator(entrypoint);
 
 main() {
   initConfig();
@@ -125,10 +125,9 @@ main() {
       var pkg = packageMap("test_pkg", "1.0.0");
       pkg.remove("author");
       pkg["authors"] = [
-        "Bob Nystrom <rnystrom@google.com>",
-        "Natalie Weizenbaum",
-        "John Messerly <jmesserly@google.com>"
-      ];
+          "Bob Nystrom <rnystrom@google.com>",
+          "Natalie Weizenbaum",
+          "John Messerly <jmesserly@google.com>"];
       d.dir(appPath, [d.pubspec(pkg)]).create();
 
       expectValidationWarning(pubspecField);
@@ -146,10 +145,9 @@ main() {
       var pkg = packageMap("test_pkg", "1.0.0");
       pkg.remove("author");
       pkg["authors"] = [
-        "Bob Nystrom <rnystrom@google.com>",
-        "<nweiz@google.com>",
-        "John Messerly <jmesserly@google.com>"
-      ];
+          "Bob Nystrom <rnystrom@google.com>",
+          "<nweiz@google.com>",
+          "John Messerly <jmesserly@google.com>"];
       d.dir(appPath, [d.pubspec(pkg)]).create();
 
       expectValidationWarning(pubspecField);