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

sdk/lib/_internal/pub_generated/test/validator/utf8_readme_test.dart

Index: sdk/lib/_internal/pub_generated/test/validator/utf8_readme_test.dart
diff --git a/sdk/lib/_internal/pub/test/validator/utf8_readme_test.dart b/sdk/lib/_internal/pub_generated/test/validator/utf8_readme_test.dart
similarity index 71%
copy from sdk/lib/_internal/pub/test/validator/utf8_readme_test.dart
copy to sdk/lib/_internal/pub_generated/test/validator/utf8_readme_test.dart
index 60e65fdbd44fa7c3dc49c4d168c8eeb7157fe9e9..a2e3cf19cd71063e8ccd5cd9ced5e8144f1ac355 100644
--- a/sdk/lib/_internal/pub/test/validator/utf8_readme_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/validator/utf8_readme_test.dart
@@ -12,7 +12,7 @@ import '../test_pub.dart';
 import 'utils.dart';
 
 Validator utf8Readme(Entrypoint entrypoint) =>
-  new Utf8ReadmeValidator(entrypoint);
+    new Utf8ReadmeValidator(entrypoint);
 
 main() {
   initConfig();
@@ -23,21 +23,21 @@ main() {
     integration('looks normal', () => expectNoValidationError(utf8Readme));
 
     integration('has a non-primary readme with invalid utf-8', () {
-      d.dir(appPath, [
-        d.file("README", "Valid utf-8"),
-        d.binaryFile("README.invalid", [192])
-      ]).create();
+      d.dir(
+          appPath,
+          [
+              d.file("README", "Valid utf-8"),
+              d.binaryFile("README.invalid", [192])]).create();
       expectNoValidationError(utf8Readme);
     });
   });
 
-  integration('should consider a package invalid if it has a README with '
-      'invalid utf-8', () {
+  integration(
+      'should consider a package invalid if it has a README with ' 'invalid utf-8',
+      () {
     d.validPackage.create();
 
-    d.dir(appPath, [
-      d.binaryFile("README", [192])
-    ]).create();
+    d.dir(appPath, [d.binaryFile("README", [192])]).create();
     expectValidationWarning(utf8Readme);
   });
 }