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

sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart

Index: sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/exclusion/works_on_aggregate_transformer_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
similarity index 80%
copy from sdk/lib/_internal/pub/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
copy to sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
index 819d30ffffe27f989fa2db79f6bbdc71da468c05..436aa6e871553793c32324904faffaa4069f7368 100644
--- a/sdk/lib/_internal/pub/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart
@@ -39,28 +39,23 @@ main() {
   initConfig();
   withBarbackVersions(">=0.14.1", () {
     integration("works on an aggregate transformer", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
-          "transformers": [
-            {
+          "transformers": [{
               "myapp": {
                 "\$include": ["web/a.txt", "web/b.txt", "web/c.txt"],
                 "\$exclude": "web/a.txt"
               }
-            }
-          ]
+            }]
         }),
-        d.dir("lib", [
-          d.file("transformer.dart", AGGREGATE_TRANSFORMER),
-        ]),
-        d.dir("web", [
-          d.file("a.txt", "a"),
-          d.file("b.txt", "b"),
-          d.file("c.txt", "c"),
-          d.file("d.txt", "d")
-        ])
-      ]).create();
+            d.dir("lib", [d.file("transformer.dart", AGGREGATE_TRANSFORMER),]),
+            d.dir(
+                "web",
+                [
+                    d.file("a.txt", "a"),
+                    d.file("b.txt", "b"),
+                    d.file("c.txt", "c"),
+                    d.file("d.txt", "d")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);