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

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

Index: sdk/lib/_internal/pub_generated/test/transformer/loads_an_aggregate_transformer_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/loads_an_aggregate_transformer_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/loads_an_aggregate_transformer_test.dart
similarity index 85%
copy from sdk/lib/_internal/pub/test/transformer/loads_an_aggregate_transformer_test.dart
copy to sdk/lib/_internal/pub_generated/test/transformer/loads_an_aggregate_transformer_test.dart
index 1b058f6f51765d66b2bca7ec2dc37c4a71e034cd..6872b8d43684ab020ba62bf3d758d66d018af799 100644
--- a/sdk/lib/_internal/pub/test/transformer/loads_an_aggregate_transformer_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/loads_an_aggregate_transformer_test.dart
@@ -39,19 +39,12 @@ main() {
   initConfig();
   withBarbackVersions(">=0.14.1", () {
     integration("loads an aggregate transformer", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp"]
         }),
-        d.dir("lib", [
-          d.file("transformer.dart", AGGREGATE_TRANSFORMER),
-        ]),
-        d.dir("web", [
-          d.file("foo.txt", "foo"),
-          d.file("bar.txt", "bar")
-        ])
-      ]).create();
+            d.dir("lib", [d.file("transformer.dart", AGGREGATE_TRANSFORMER),]),
+            d.dir("web", [d.file("foo.txt", "foo"), d.file("bar.txt", "bar")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);