Revert "Set runtime type on list and map literals."

tests/language/map_literal12_test.dart

Index: tests/language/map_literal12_test.dart
diff --git a/tests/language/map_literal12_test.dart b/tests/language/map_literal12_test.dart
deleted file mode 100644
index c3c02b6d2a73898cfda3a4d1de8094a91bf28865..0000000000000000000000000000000000000000
--- a/tests/language/map_literal12_test.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2013, 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.
-// Dart test program for testing the instanceof operation.
-
-import "package:expect/expect.dart";
-
-main() {
-  var x = <int, String>{};
-  Expect.isTrue(x is Map<int, String>);
-  Expect.isFalse(x is Map<double, String>);
-  Expect.isFalse(x is Map<int, double>);
-}