Start pulling pub from its own repo.

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

Index: sdk/lib/_internal/pub/test/upgrade/git/do_not_upgrade_if_unneeded_test.dart
diff --git a/sdk/lib/_internal/pub/test/upgrade/git/do_not_upgrade_if_unneeded_test.dart b/sdk/lib/_internal/pub/test/upgrade/git/do_not_upgrade_if_unneeded_test.dart
deleted file mode 100644
index 4efce84c7af53eb853216f4b2b2e3f48e4e87d8d..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/test/upgrade/git/do_not_upgrade_if_unneeded_test.dart
+++ /dev/null
@@ -1,64 +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 one locked Git package's dependencies if it's "
-      "not necessary", () {
-    ensureGit();
-
-    d.git('foo.git', [
-      d.libDir('foo'),
-      d.libPubspec("foo", "1.0.0", deps: {
-        "foo-dep": {"git": "../foo-dep.git"
-      }})
-    ]).create();
-
-    d.git('foo-dep.git', [
-      d.libDir('foo-dep'),
-      d.libPubspec('foo-dep', '1.0.0')
-    ]).create();
-
-    d.appDir({"foo": {"git": "../foo.git"}}).create();
-
-    pubGet();
-
-    d.dir(packagesPath, [
-      d.dir('foo', [
-        d.file('foo.dart', 'main() => "foo";')
-      ]),
-      d.dir('foo-dep', [
-        d.file('foo-dep.dart', 'main() => "foo-dep";')
-      ])
-    ]).validate();
-
-    d.git('foo.git', [
-      d.libDir('foo', 'foo 2'),
-      d.libPubspec("foo", "1.0.0", deps: {
-        "foo-dep": {"git": "../foo-dep.git"}
-      })
-    ]).create();
-
-    d.git('foo-dep.git', [
-      d.libDir('foo-dep', 'foo-dep 2'),
-      d.libPubspec('foo-dep', '1.0.0')
-    ]).commit();
-
-    pubUpgrade(args: ['foo']);
-
-    d.dir(packagesPath, [
-      d.dir('foo', [
-        d.file('foo.dart', 'main() => "foo 2";')
-      ]),
-      d.dir('foo-dep', [
-        d.file('foo-dep.dart', 'main() => "foo-dep";')
-      ]),
-    ]).validate();
-  });
-}