title: How to have only CSV, XLS, XLSX options in django-import-export?
body: <p>I have implemented <a href="https://github.com/django-import-export/django-import-export" rel="noreferrer">django-import-export</a> for my project. </p>
  
  <p>It provides me many file format options by default fro both import and export.</p>
  
  <p>How to restrict the file formats to only CSV, XLS and XLSX ?</p>
  
  <p><a href="https://i.stack.imgur.com/utqPv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/utqPv.png" alt="enter image description here"></a></p>