Customizr: remove 3 bar menu button in mobile

Hi,
Great theme, easy to use even for a non-expert….
One question: I want to remove de 3-bar menu button from the mobile version (I do not use a menu in de laptopversion). I have seen several (closed) threads, in which changes are suggested in the child theme. For instance:

.navbar-wrapper.clearfix.span9 {
display: none;
}

#menu-main_menu, .icon-feed, .navbar.resp {
  display: none;
}

The problem is: the 3bar menu button in both cases disasppears in mobile, but so does the title and subtible in the header in the laptop version…. Any suggestions how to over come this? WOuld be highly appreciated!

Michiel
https://www.vakantiehuisbrummel.nl