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

sdk/lib/_internal/pub_generated/test/run/doesnt_load_an_unnecessary_transformer_test.dart

Index: sdk/lib/_internal/pub_generated/test/run/doesnt_load_an_unnecessary_transformer_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/doesnt_load_an_unnecessary_transformer_test.dart b/sdk/lib/_internal/pub_generated/test/run/doesnt_load_an_unnecessary_transformer_test.dart
similarity index 71%
copy from sdk/lib/_internal/pub/test/run/doesnt_load_an_unnecessary_transformer_test.dart
copy to sdk/lib/_internal/pub_generated/test/run/doesnt_load_an_unnecessary_transformer_test.dart
index 098b166f68bf7a44bd7c0e93da2fd55410ecc3b1..fefb202aaf910ddb2523e7d998a0e2e3e393c8bb 100644
--- a/sdk/lib/_internal/pub/test/run/doesnt_load_an_unnecessary_transformer_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/run/doesnt_load_an_unnecessary_transformer_test.dart
@@ -26,21 +26,20 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("doesn't load an unnecessary transformer", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
-          "transformers": [
-            {"myapp/src/transformer": {r"$include": "lib/myapp.dart"}}
-          ]
+          "transformers": [{
+              "myapp/src/transformer": {
+                r"$include": "lib/myapp.dart"
+              }
+            }]
         }),
-        d.dir("lib", [
-          d.file("myapp.dart", ""),
-          d.dir("src", [d.file("transformer.dart", TRANSFORMER)])
-        ]),
-        d.dir("bin", [
-          d.file("hi.dart", "void main() => print('Hello!');")
-        ])
-      ]).create();
+            d.dir(
+                "lib",
+                [
+                    d.file("myapp.dart", ""),
+                    d.dir("src", [d.file("transformer.dart", TRANSFORMER)])]),
+            d.dir("bin", [d.file("hi.dart", "void main() => print('Hello!');")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);