Revert last 4 commits by lrn@

tests/language/part_of_uri_test.dart

Index: tests/language/part_of_uri_test.dart
diff --git a/tests/language/part_of_uri_test.dart b/tests/language/part_of_uri_test.dart
deleted file mode 100644
index 4c313a0cccd0d54bd21e62c251e7cfb426321feb..0000000000000000000000000000000000000000
--- a/tests/language/part_of_uri_test.dart
+++ /dev/null
@@ -1,14 +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.
-
-// No library declaration
-part "part_of_uri_part.dart";  // declares bar1, baz1
-part "part_of_uri_part2.dart";  // declares bar2, baz2
-
-const foo = 'foo';
-const qux = "$baz1$baz2";
-
-main() {
-  if (!identical(qux, "foopart21foopart12")) throw "Fail: $qux";
-}