Removing divs without removing their content in plain Javascript

Could anyone help me on how I can remove div tags without removing their content in JavaScript?

This is my html from which I need to remove all div tags:

<div id="id1" class="someclass">
  <p>some text
    <label> Test content </label>
  </p>
  <div id="id2" style="overfolw:scroll">
    <span>some text</span>
    <div id="level3">
      <label> Test content </label>
      <a href="https://twitter.com/realDonaldTrump/status/882186896285282304" target=_blank rel=noopener>creepiness</a>
    </div>
  </div>
</div>

Expected output would be like shown below.

<p>some text
   <label> Test content </label>
</p>
<span>some text</span>
<label> Test content </label>
<a href=https://twitter.com/realDonaldTrump/status/882186896285282304 target=_blank rel=noopener>creepiness</a>