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

sdk/lib/_internal/pub_generated/test/dart2js/minifies_in_release_mode_test.dart

Index: sdk/lib/_internal/pub_generated/test/dart2js/minifies_in_release_mode_test.dart
diff --git a/sdk/lib/_internal/pub/test/dart2js/minifies_in_release_mode_test.dart b/sdk/lib/_internal/pub_generated/test/dart2js/minifies_in_release_mode_test.dart
similarity index 73%
copy from sdk/lib/_internal/pub/test/dart2js/minifies_in_release_mode_test.dart
copy to sdk/lib/_internal/pub_generated/test/dart2js/minifies_in_release_mode_test.dart
index b4694064d2c09812aba52d0cbc8d34cca9dca96f..147c41fa432786a7ce283cb4241052381ff1582c 100644
--- a/sdk/lib/_internal/pub/test/dart2js/minifies_in_release_mode_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/dart2js/minifies_in_release_mode_test.dart
@@ -9,12 +9,13 @@ import '../serve/utils.dart';
 main() {
   initConfig();
   integration("generates minified JS in release mode", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("web", [
-        d.file("main.dart", "void main() => print('hello');")
-      ])
-    ]).create();
+    d.dir(
+        appPath,
+        [
+            d.appPubspec(),
+            d.dir(
+                "web",
+                [d.file("main.dart", "void main() => print('hello');")])]).create();
 
     pubServe(args: ["--mode", "release"]);
     requestShouldSucceed("main.dart.js", isMinifiedDart2JSOutput);