Handsontable remove settings [especially width and height]

I am working with handsontable [JavaScript Spreadsheet library] and want to toggle settings with a bootstrap-styled-checkbox. The first thing was, to set a specific width and height to the table when the box is checked and to undo this fixed size (so it automatically resizes again) when uncheck the box. Here is my current code:

$('#mycheckbox').click(function() {
  if($('#mycheckbox').prop("checked") == true){
    handsontable_table.updateSettings({
       width: 725,
       height:100
    })
  }else{
  handsontable_table.updateSettings({
        // missing :(
  })
 }
});

At first, my handsontable-table is automatically sized to the correct size. When I check the checkbox, the table resizes to the given width and height. But I don't know how to remove this width- and height-settings. I tried to set them to 'false' or 0 or remove these settings with jQuery-.removeProp(), but none of them does what I want. And I can't find something right in the handsontable-docs (or other sites).

I very appreciate your help!