Start pulling pub from its own repo.

sdk/lib/_internal/pub/test/upgrade/git/upgrade_to_incompatible_pubspec_test.dart

Index: sdk/lib/_internal/pub/test/upgrade/git/upgrade_to_incompatible_pubspec_test.dart
diff --git a/sdk/lib/_internal/pub/test/upgrade/git/upgrade_to_incompatible_pubspec_test.dart b/sdk/lib/_internal/pub/test/upgrade/git/upgrade_to_incompatible_pubspec_test.dart
deleted file mode 100644
index 90995ea356dd4ab78808c274604ffc773e3642dd..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/upgrade/git/upgrade_to_incompatible_pubspec_test.dart
+++ /dev/null
@@ -1,47 +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 'package:scheduled_test/scheduled_test.dart';
-
-import '../../../lib/src/exit_codes.dart' as exit_codes;
-import '../../descriptor.dart' as d;
-import '../../test_pub.dart';
-
-main() {
-  initConfig();
-  integration("upgrades Git packages to an incompatible pubspec", () {
-    ensureGit();
-
-    d.git('foo.git', [
-      d.libDir('foo'),
-      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";')
-      ])
-    ]).validate();
-
-    d.git('foo.git', [
-      d.libDir('zoo'),
-      d.libPubspec('zoo', '1.0.0')
-    ]).commit();
-
-    pubUpgrade(error: contains('"name" field doesn\'t match expected name '
-        '"foo".'), exitCode: exit_codes.DATA);
-
-    d.dir(packagesPath, [
-      d.dir('foo', [
-        d.file('foo.dart', 'main() => "foo";')
-      ])
-    ]).validate();
-  });
-}