Revert last 4 commits by lrn@

tests/language/part_of_uri2_part.dart

Index: tests/language/part_of_uri2_part.dart
diff --git a/tests/language/part_of_uri2_part.dart b/tests/language/part_of_uri2_part.dart
deleted file mode 100644
index 22c889a5fd7560a8a663fd865ea168cbc36bda1e..0000000000000000000000000000000000000000
--- a/tests/language/part_of_uri2_part.dart
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright (c) 2017, 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.
-
-part of "part_of_uri2_test.dart";
-
-// Refer to declaration in library and other part.
-const bar1 = "part1";
-const baz1 = "$foo${bar2}1";