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

sdk/lib/_internal/pub_generated/test/transformer/prints_a_transform_error_in_apply_test.dart

Index: sdk/lib/_internal/pub_generated/test/transformer/prints_a_transform_error_in_apply_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/prints_a_transform_error_in_apply_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/prints_a_transform_error_in_apply_test.dart
similarity index 71%
copy from sdk/lib/_internal/pub/test/transformer/prints_a_transform_error_in_apply_test.dart
copy to sdk/lib/_internal/pub_generated/test/transformer/prints_a_transform_error_in_apply_test.dart
index 2ec83207e4189e55d87e190ffec601180c4bf994..af118726a75330377f5cae5e39622fc322e353bd 100644
--- a/sdk/lib/_internal/pub/test/transformer/prints_a_transform_error_in_apply_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/prints_a_transform_error_in_apply_test.dart
@@ -26,25 +26,19 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("prints a transform error in apply", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", transformer)
-        ])]),
-        d.dir("web", [
-          d.file("foo.txt", "foo")
-        ])
-      ]).create();
+            d.dir("lib", [d.dir("src", [d.file("transformer.dart", transformer)])]),
+            d.dir("web", [d.file("foo.txt", "foo")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       var server = pubServe();
-      server.stderr.expect(emitsLines(
-          'Build error:\n'
-          'Transform Rewrite on myapp|web/foo.txt threw error: oh no!'));
+      server.stderr.expect(
+          emitsLines(
+              'Build error:\n' 'Transform Rewrite on myapp|web/foo.txt threw error: oh no!'));
       endPubServe();
     });
   });