I need to remove the mobile sticky menu in the mobile version

Hello @alenakalinovskaya,

To remove the mobile menu please add below given CSS by going to Admin Panel > Appearance > Customize > Additional CSS.

@media only screen and (max-width: 900px){
.mobile-nav-wrap {
    display: none;
}
}

Also, for any query/confusion, please post them in our official support forum below:

https://themepalace.com/forum/free-themes/clean-commerce/

Thank you.