Revert of [modules] Properly initialize declared variables.

test/mjsunit/modules-init3.js

-// Copyright 2016 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.
-//
-// MODULE
-
-import {check} from "modules-skip-init3.js";
-
-assertSame(undefined, w);
-assertThrows(() => x, ReferenceError);
-assertThrows(() => y, ReferenceError);
-assertThrows(() => z, ReferenceError);
-
-export function* v() { return 40 }
-export var w = 41;
-export let x = 42;
-export class y {};
-export const z = "hello world";
-
-assertTrue(check());