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

sdk/lib/_internal/pub_generated/test/global/activate/git_package_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:scheduled_test/scheduled_test.dart';
+
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+
+main() {
+  initConfig();
+  integration('activates a package from a Git repo', () {
+    ensureGit();
+
+    d.git(
+        'foo.git',
+        [
+            d.libPubspec("foo", "1.0.0"),
+            d.dir("bin", [d.file("foo.dart", "main() => print('ok');")])]).create();
+
+    schedulePub(
+        args: ["global", "activate", "-sgit", "../foo.git"],
+        output: allOf(
+            startsWith('Resolving dependencies...\n' '+ foo 1.0.0 from git ../foo.git at '),
+            // Specific revision number goes here.
+    endsWith(
+        'Precompiling executables...\n' 'Loading source assets...\n'
+            'Precompiled foo:foo.\n'
+            'Activated foo 1.0.0 from Git repository "../foo.git".')));
+  });
+}