[strong] Remove all remainders of strong mode

test/mjsunit/strong/load-builtins.js

-// Copyright 2015 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: --strong-mode
-
-function getGlobal() {
-  return this;
-}
-
-function polluteGlobal() {
-  bar = 0;
-}
-
-(function() {
-  "use strict";
-
-  let builtins = [
-    Array,
-    Object,
-    Function,
-    getGlobal()
-  ];
-
-  for (let builtin of builtins) {
-    assertThrows(function(){"use strong"; builtin.foo}, TypeError);
-    assertThrows(function(){"use strong"; builtin[0]}, TypeError);
-    assertThrows(function(){"use strong"; builtin[10000]}, TypeError);
-    builtin.foo = 1;
-    assertDoesNotThrow(function(){"use strong"; builtin.foo});
-    assertThrows(function(){"use strong"; builtin.bar});
-    assertThrows(function(){"use strong"; builtin[0]}, TypeError);
-    assertThrows(function(){"use strong"; builtin[10000]}, TypeError);
-    builtin[0] = 1;
-    assertDoesNotThrow(function(){"use strong"; builtin.foo});
-    assertThrows(function(){"use strong"; builtin.bar});
-    assertDoesNotThrow(function(){"use strong"; builtin[0]});
-    assertThrows(function(){"use strong"; builtin[10000]}, TypeError);
-  }
-  polluteGlobal();
-  assertDoesNotThrow(function(){"use strong"; getGlobal().bar});
-})();