How to Hide DreamFast Commerce Float Admin Menus

function plt_hide_dreamfast_commerce_float_menus() {
	//Hide "DreamFast Commerce Float".
	remove_menu_page('dreamfast-commerce-float');
	//Hide "DreamFast Commerce Float → Dashboard".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float');
	//Hide "DreamFast Commerce Float → Sticky Cart Bar".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float-cart');
	//Hide "DreamFast Commerce Float → Contact Widget".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float-contact-widget');
	//Hide "DreamFast Commerce Float → Changelog".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float-changelog');
	//Hide "DreamFast Commerce Float → Contact Us".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float-contact');
	//Hide "DreamFast Commerce Float → Upgrade".
	remove_submenu_page('dreamfast-commerce-float', 'dreamfast-commerce-float-pricing');
}

add_action('admin_menu', 'plt_hide_dreamfast_commerce_float_menus', 1000000000);

Where do I put this code?