Use native async/await support in pub.

sdk/lib/_internal/pub_generated/lib/src/command/cache_list.dart

Index: sdk/lib/_internal/pub_generated/lib/src/command/cache_list.dart
diff --git a/sdk/lib/_internal/pub_generated/lib/src/command/cache_list.dart b/sdk/lib/_internal/pub_generated/lib/src/command/cache_list.dart
deleted file mode 100644
index 78f7e8a0cacfd58daa5c13e5f2c5293ae382542f..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub_generated/lib/src/command/cache_list.dart
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright (c) 2013, 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.command.cache_list;
-
-import 'dart:convert';
-
-import '../command.dart';
-import '../log.dart' as log;
-import '../source/cached.dart';
-
-/// Handles the `cache list` pub command.
-class CacheListCommand extends PubCommand {
-  String get name => "list";
-  String get description => "List packages in the system cache.";
-  String get invocation => "pub cache list";
-  bool get hidden => true;
-  bool get takesArguments => false;
-
-  void run() {
-    // TODO(keertip): Add flag to list packages from non default sources.
-    var packagesObj = <String, Map>{};
-
-    var source = cache.sources.defaultSource as CachedSource;
-    for (var package in source.getCachedPackages()) {
-      var packageInfo = packagesObj.putIfAbsent(package.name, () => {});
-      packageInfo[package.version.toString()] = {
-        'location': package.dir
-      };
-    }
-
-    // TODO(keertip): Add support for non-JSON format and check for --format
-    // flag.
-    log.message(JSON.encode({
-      'packages': packagesObj
-    }));
-  }
-}