[strong] Remove all remainders of strong mode

test/mjsunit/regress/regress-inline-strong-as-construct.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: --allow-natives-syntax --strong-mode
-
-// This tests that inlining a constructor call to a function which cannot be
-// used as a constructor (e.g. strong mode function) still throws correctly.
-
-function g() {
-  "use strong";
-}
-
-function f() {
-  return new g();
-}
-
-assertThrows(f);
-assertThrows(f);
-%OptimizeFunctionOnNextCall(f);
-assertThrows(f);