Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/get/switch_source_test.dart

Index: sdk/lib/_internal/pub/test/get/switch_source_test.dart
diff --git a/sdk/lib/_internal/pub/test/get/switch_source_test.dart b/sdk/lib/_internal/pub/test/get/switch_source_test.dart
deleted file mode 100644
index 4b8ad77777adc839e3ded960271583ad129a8f8e..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/get/switch_source_test.dart
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) 2012, 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 d.file.
-
-library pub_tests;
-
-import '../descriptor.dart' as d;
-import '../test_pub.dart';
-
-main() {
-  initConfig();
-  integration('re-gets a package if its source has changed', () {
-    servePackages((builder) => builder.serve("foo", "1.2.3"));
-
-    d.dir('foo', [
-      d.libDir('foo', 'foo 0.0.1'),
-      d.libPubspec('foo', '0.0.1')
-    ]).create();
-
-    d.appDir({"foo": {"path": "../foo"}}).create();
-
-    pubGet();
-
-    d.packagesDir({"foo": "0.0.1"}).validate();
-    d.appDir({"foo": "any"}).create();
-
-    pubGet();
-
-    d.packagesDir({"foo": "1.2.3"}).validate();
-  });
-}