How to remove the cart icon from menu in Hestia PRO

Basically, the cart icon will be displayed automatically if the WooCommerce plugin is active. If you are not using products/WooCommerce, deactivate it from WP-admin > Plugins, and the cart icon will be removed automatically. 

If you want to keep WooCommerce active, then you can hide it with a simple CSS code. Please navigate to  Appearance > Customize > Additional CSS section and add the following code:

#main-navigation li.nav-cart {
 display: none!important;
}

@media (max-width: 768px){
li.nav-cart.responsive-nav-cart {
    display: none; 
}
}

Save the changes and that's it. Once you have done this, the cart icon will not appear anymore: