Remove mobile theme menu

Hi,

I’m looking to either fix, or completely remove the mobile menu from my site, but not sure how to go about doing this. Since this menu only appears in the mobile version, I can’t use Chrome Dev Tools to identify the div and use CSS to disable it.

Here’s a link to my site (please load on a mobile to see what I mean). I’m working off a child theme of Superhero.

Any help would be massively appreciated!