Hi,

In Helix Ultimate You can do that by using two methods:

1. By remove php code in template file(s).
2. Or, by Custom CSS:

@media screen and (max-width: 990px) {
 body.ltr #offcanvas-toggler.offcanvas-toggler-right,
 .header-has-modules #offcanvas-toggler {display: none !important; visibility: hidden; 
    position:absolute; left:-10000px;top:auto; width:1px;height:1px; overflow:hidden;}
    }