Remove distraction free mode from teeny editor

So after researching some wordpress filters i found the teeny_mce_buttons and removed the distraction free button with this function.

  function remove_teeny_mce_btns($buttons) {
    unset($buttons[13]);
    return $buttons;
    }

    add_filter('teeny_mce_buttons', 'remove_teeny_mce_btns');

Here is the link with the solution:

https://www.gavick.com/blog/wordpress-tinymce-custom-buttons