Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/serve/does_not_serve_hidden_assets_test.dart

Index: sdk/lib/_internal/pub/test/serve/does_not_serve_hidden_assets_test.dart
diff --git a/sdk/lib/_internal/pub/test/serve/does_not_serve_hidden_assets_test.dart b/sdk/lib/_internal/pub/test/serve/does_not_serve_hidden_assets_test.dart
deleted file mode 100644
index 0429e7efd7ed91cba68a15506c1ef832e72c97ad..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/serve/does_not_serve_hidden_assets_test.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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';
-import 'utils.dart';
-
-main() {
-  initConfig();
-  integration("doesn't serve hidden assets", () {
-    d.dir(appPath, [
-      d.appPubspec(),
-      d.dir("web", [
-        d.file(".outer.txt", "outer contents"),
-        d.dir(".dir", [
-          d.file("inner.txt", "inner contents"),
-        ])
-      ])
-    ]).create();
-
-    pubServe();
-    requestShould404(".outer.txt");
-    requestShould404(".dir/inner.txt");
-    endPubServe();
-  });
-}