title: bootstrap 4.1 - to get grid system only
body: <p>Hails guys!
  Is there a way to customize <strong>Bootstrap 4.1</strong> to build a custom version with only two things: <strong>Grid system and Responsive utilities</strong>.
  Here is the link to do that for 3.3 but for some reason the final compilation doesn't work:</p>
  
  <p><a href="https://getbootstrap.com/docs/3.3/customize/" rel="noreferrer">https://getbootstrap.com/docs/3.3/customize/</a></p>
  
  <p>I could do that manually from the original file but, maybe there is a way to get that from Bootstrap instead of stripping their CSS off. </p>