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

sdk/lib/_internal/pub_generated/test/serve/supports_user_defined_lazy_transformers_test.dart

Index: sdk/lib/_internal/pub_generated/test/serve/supports_user_defined_lazy_transformers_test.dart
diff --git a/sdk/lib/_internal/pub/test/serve/supports_user_defined_lazy_transformers_test.dart b/sdk/lib/_internal/pub_generated/test/serve/supports_user_defined_lazy_transformers_test.dart
similarity index 70%
copy from sdk/lib/_internal/pub/test/serve/supports_user_defined_lazy_transformers_test.dart
copy to sdk/lib/_internal/pub_generated/test/serve/supports_user_defined_lazy_transformers_test.dart
index 69859f47769da47b6e4d027c435b072c829d81f3..3c19427ea4037c69588e5a944d1f6f3fad45e7df 100644
--- a/sdk/lib/_internal/pub/test/serve/supports_user_defined_lazy_transformers_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/serve/supports_user_defined_lazy_transformers_test.dart
@@ -12,18 +12,12 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration("supports a user-defined lazy transformer", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", LAZY_TRANSFORMER)
-        ])]),
-        d.dir("web", [
-          d.file("foo.txt", "foo")
-        ])
-      ]).create();
+            d.dir("lib", [d.dir("src", [d.file("transformer.dart", LAZY_TRANSFORMER)])]),
+            d.dir("web", [d.file("foo.txt", "foo")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
@@ -32,9 +26,8 @@ main() {
       server.stdout.expect('Build completed successfully');
 
       requestShouldSucceed("foo.out", "foo.out");
-      server.stdout.expect(emitsLines(
-          '[Info from LazyRewrite]:\n'
-          'Rewriting myapp|web/foo.txt.'));
+      server.stdout.expect(
+          emitsLines('[Info from LazyRewrite]:\n' 'Rewriting myapp|web/foo.txt.'));
       endPubServe();
     });
   });