Migrate language block 46 - canonical_const ... char_escape.

tests/language/canonical_const2_test.dart

Index: tests/language/canonical_const2_test.dart
diff --git a/tests/language/canonical_const2_test.dart b/tests/language/canonical_const2_test.dart
deleted file mode 100644
index fbad2cd6d89cd446a12eec189eedad87fa653612..0000000000000000000000000000000000000000
--- a/tests/language/canonical_const2_test.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright (c) 2011, 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.
-
-import "package:expect/expect.dart";
-
-// Check that compile-time constants are correctly canonicalized.
-
-main() {
-  Expect.isFalse(identical(const <num>[1, 2], const <num>[1.0, 2.0]));
-}