test rename overhaul: step 8 - language tests

tests/language/src/CompileTimeConstantKTest.dart

-// 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.
-
-final x = const { 'a': 3, 'a': 4 };
-final y = const { 'a': 10, 'b': 11, 'a': 12, 'b': 13, 'a': 14 };
-final z = const { '__proto__': 496,
-                  '__proto__': 497,
-                  '__proto__': 498,
-                  '__proto__': 499 };
-
-final x2 = const { 'a': 4 };
-final y2 = const { 'a': 14, 'b': 13 };
-final z2 = const { '__proto__': 499 };
-
-main() {
-  Expect.identical(x2, x);
-  Expect.identical(y2, y);
-  Expect.identical(z2, z);
-}