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

sdk/lib/_internal/pub_generated/test/snapshot/doesnt_load_irrelevant_transformers_test.dart

Index: sdk/lib/_internal/pub_generated/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
diff --git a/sdk/lib/_internal/pub/test/snapshot/doesnt_load_irrelevant_transformers_test.dart b/sdk/lib/_internal/pub_generated/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
similarity index 73%
copy from sdk/lib/_internal/pub/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
copy to sdk/lib/_internal/pub_generated/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
index b0b412d892aa21b750ed19abcb75a74efca96ab5..7759718f0d3d4d97c53e1065cdc9ac607b81291c 100644
--- a/sdk/lib/_internal/pub/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/snapshot/doesnt_load_irrelevant_transformers_test.dart
@@ -30,16 +30,14 @@ main() {
     servePackages((builder) {
       builder.serveRepoPackage('barback');
 
-      builder.serve("foo", "1.2.3",
+      builder.serve(
+          "foo",
+          "1.2.3",
           contents: [
-        d.dir("bin", [
-          d.file("hello.dart", "void main() => print('hello!');")
-        ])
-      ]);
+              d.dir("bin", [d.file("hello.dart", "void main() => print('hello!');")])]);
     });
 
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "dependencies": {
           "foo": "1.2.3",
@@ -47,16 +45,16 @@ main() {
         },
         "transformers": ["myapp"]
       }),
-      d.dir("lib", [
-        d.file("transformer.dart", BROKEN_TRANSFORMER)
-      ])
-    ]).create();
+          d.dir("lib", [d.file("transformer.dart", BROKEN_TRANSFORMER)])]).create();
 
     pubGet(output: contains("Precompiled foo:hello."));
 
-    d.dir(p.join(appPath, '.pub', 'bin'), [
-      d.dir('foo', [d.matcherFile('hello.dart.snapshot', contains('hello!'))])
-    ]).validate();
+    d.dir(
+        p.join(appPath, '.pub', 'bin'),
+        [
+            d.dir(
+                'foo',
+                [d.matcherFile('hello.dart.snapshot', contains('hello!'))])]).validate();
 
     var process = pubRun(args: ['foo:hello']);
     process.stdout.expect("hello!");