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

sdk/lib/_internal/pub_generated/test/global/activate/activate_hosted_after_path_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:path/path.dart' as p;
 
 import '../../../lib/src/io.dart';
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration('activating a hosted package deactivates the path one', () {
     servePackages((builder) {
-      builder.serve("foo", "2.0.0", contents: [
-        d.dir("bin", [
-          d.file("foo.dart", "main(args) => print('hosted');")
-        ])
-      ]);
+      builder.serve(
+          "foo",
+          "2.0.0",
+          contents: [
+              d.dir("bin", [d.file("foo.dart", "main(args) => print('hosted');")])]);
     });
 
-    d.dir("foo", [
-      d.libPubspec("foo", "1.0.0"),
-      d.dir("bin", [
-        d.file("foo.dart", "main() => print('path');")
-      ])
-    ]).create();
+    d.dir(
+        "foo",
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("bin", [d.file("foo.dart", "main() => print('path');")])]).create();
 
     schedulePub(args: ["global", "activate", "-spath", "../foo"]);
 
     var path = canonicalize(p.join(sandboxDir, "foo"));
     schedulePub(args: ["global", "activate", "foo"], output: """
         Package foo is currently active at path "$path".
         Resolving dependencies...
         + foo 2.0.0
         Downloading foo 2.0.0...
         Precompiling executables...
         Loading source assets...
         Precompiled foo:foo.
         Activated foo 2.0.0.""");
 
     // Should now run the hosted one.
     var pub = pubRun(global: true, args: ["foo"]);
     pub.stdout.expect("hosted");
     pub.shouldExit();
   });
 }