title: SnapSVG: Remove mask from an element (unmask)
body: <p>I have my JS code in which I use Snap SVG. At some point I use </p>
  
  <pre><code>element.attr({mask:maskelement});
  </code></pre>
  
  <p>In that snippet, <code>element</code> and <code>maskelement</code> are two elements inside my svg.</p>
  
  <p>Now I want to remove the mask. What would be the correct code that achieves this?</p>