Revert of [modules] Properly initialize declared variables.

test/mjsunit/modules-skip-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.
-
-import {v, w, x, y, z} from "modules-init3.js";
-
-assertEquals({value: 40, done: true}, v().next());
-assertSame(undefined, w);
-assertThrows(() => x, ReferenceError);
-assertThrows(() => y, ReferenceError);
-assertThrows(() => z, ReferenceError);
-
-export function check() {
-  assertEquals({value: 40, done: true}, v().next());
-  assertEquals(41, w);
-  assertEquals(42, x);
-  assertEquals("y", y.name);
-  assertEquals("hello world", z);
-  return true;
-}