Remove floating Menu button on mobile from my shopify store & relocate it to the header section.

Hey there,
I need to make a site edit to my Shopify store.

Remove floating Menu button on mobile from my Shopify store & relocate it to the header section.

I need this turned around quickly.

Pleas see the site here www.gymgum.co

Please do not respond if you are not capable of making the changes.

Thanks
Rahul