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

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

Index: sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_transformer_group_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/exclusion/works_on_transformer_group_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_transformer_group_test.dart
similarity index 65%
copy from sdk/lib/_internal/pub/test/transformer/exclusion/works_on_transformer_group_test.dart
copy to sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_transformer_group_test.dart
index 27fd71cbe70f577b9ed6cd0c47c4cf39ef8fa14a..f4d6acbc5711937f28d43ff1a4c6c7c50bb6ed8b 100644
--- a/sdk/lib/_internal/pub/test/transformer/exclusion/works_on_transformer_group_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_transformer_group_test.dart
@@ -24,28 +24,29 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("works on a transformer group", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
-          "transformers": [
-            {
+          "transformers": [{
               "myapp/src/group": {
                 "\$include": ["web/a.txt", "web/b.txt"],
                 "\$exclude": "web/a.txt"
               }
-            }
-          ]
+            }]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", REWRITE_TRANSFORMER),
-          d.file("group.dart", GROUP)
-        ])]),
-        d.dir("web", [
-          d.file("a.txt", "a.txt"),
-          d.file("b.txt", "b.txt"),
-          d.file("c.txt", "c.txt")
-        ])
-      ]).create();
+            d.dir(
+                "lib",
+                [
+                    d.dir(
+                        "src",
+                        [
+                            d.file("transformer.dart", REWRITE_TRANSFORMER),
+                            d.file("group.dart", GROUP)])]),
+            d.dir(
+                "web",
+                [
+                    d.file("a.txt", "a.txt"),
+                    d.file("b.txt", "b.txt"),
+                    d.file("c.txt", "c.txt")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);