Migrating block 50, first commit, after tool has run

tests/language_strong/compile_time_constant_h_test.dart

Index: tests/language_strong/compile_time_constant_h_test.dart
diff --git a/tests/language_strong/compile_time_constant_h_test.dart b/tests/language_strong/compile_time_constant_h_test.dart
deleted file mode 100644
index 34098826f3e568bc62ef409a8b3fd7c88e61fbbe..0000000000000000000000000000000000000000
--- a/tests/language_strong/compile_time_constant_h_test.dart
+++ /dev/null
@@ -1,20 +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.
-
-import "package:expect/expect.dart";
-
-class A implements B {
-  final x;
-  const A(this.x);
-}
-
-abstract class B {
-  const factory B(x) = A;
-}
-
-const b1 = const B(499);
-
-main() {
-  Expect.equals(499, b1.x);
-}