Remove support for legacy const, part 1

test/mjsunit/regress/regress-436896.js

Index: test/mjsunit/regress/regress-436896.js
diff --git a/test/mjsunit/regress/regress-436896.js b/test/mjsunit/regress/regress-436896.js
deleted file mode 100644
index fee44dee8c0fe24c4882551b67c4499d1f092acb..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-436896.js
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2014 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --allow-natives-syntax --legacy-const
-
-function f(x) {
-  const x = 0;
-  return x;
-}
-
-function g(x) {
-  return f(x);
-}
-
-%OptimizeFunctionOnNextCall(g);
-assertThrows(function() { g(42); }, SyntaxError);