title: How to remove the border line in a div-CSS
body: <p>I'm using the following css to style a div:</p>
  
  <pre><code>.mod head-update{
      height: 40px;
      border-style: none!important;
      padding-bottom: 20px;
      padding-top: 20px;
  }
  </code></pre>
  
  <p>Yet I get 2 grey lines at the top and bottom of the div.
  How can I remove it?</p>