Edit in JSFiddle

<h2>No link icon</h2>
<h3>Supressing an individual external link icon</h3>
<ul>
  <li class="no-link-icon"><a href="https://www.google.com">External Link 1</a></li>
  <li><a href="https://www.google.com">External Link 2</a></li>
  <li><a href="https://www.google.com">External Link 3</a></li>
</ul>

<h3>Supressing an all external links in a container</h3>
<ul class="no-link-icon">
  <li><a href="https://www.google.com">External Link 1</a></li>
  <li><a href="https://www.google.com">External Link 2</a></li>
  <li><a href="https://www.google.com">External Link 3</a></li>
</ul>