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

sdk/lib/_internal/pub_generated/test/get/git/stay_locked_if_compatible_test.dart

Index: sdk/lib/_internal/pub_generated/test/get/git/stay_locked_if_compatible_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/get/git/stay_locked_if_compatible_test.dart b/sdk/lib/_internal/pub_generated/test/get/git/stay_locked_if_compatible_test.dart
deleted file mode 100644
index 962efb221a8d8a603e078cb4b01b296b10b420fc..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/test/get/git/stay_locked_if_compatible_test.dart
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright (c) 2012, 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.
-
-library pub_tests;
-
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration(
-      "doesn't upgrade a locked Git package with a new compatible " "constraint",
-      () {
-    ensureGit();
-
-    d.git(
-        'foo.git',
-        [d.libDir('foo', 'foo 1.0.0'), d.libPubspec("foo", "1.0.0")]).create();
-
-    d.appDir({
-      "foo": {
-        "git": "../foo.git"
-      }
-    }).create();
-
-    pubGet();
-
-    d.dir(
-        packagesPath,
-        [d.dir('foo', [d.file('foo.dart', 'main() => "foo 1.0.0";')])]).validate();
-
-    d.git(
-        'foo.git',
-        [d.libDir('foo', 'foo 1.0.1'), d.libPubspec("foo", "1.0.1")]).commit();
-
-    d.appDir({
-      "foo": {
-        "git": "../foo.git",
-        "version": ">=1.0.0"
-      }
-    }).create();
-
-    pubGet();
-
-    d.dir(
-        packagesPath,
-        [d.dir('foo', [d.file('foo.dart', 'main() => "foo 1.0.0";')])]).validate();
-  });
-}