How to Hide Licenzo Admin Menus

function plt_hide_licenzo_menus() {
	//Hide "Licenzo".
	remove_menu_page('licenzo-app');
	//Hide "Licenzo → Dashboard".
	remove_submenu_page('licenzo-app', 'licenzo-app');
	//Hide "Licenzo → Products".
	remove_submenu_page('licenzo-app', 'http://127.0.0.1/wp-admin/admin.php?page=licenzo-app#/products');
	//Hide "Licenzo → Customers".
	remove_submenu_page('licenzo-app', 'http://127.0.0.1/wp-admin/admin.php?page=licenzo-app#/customers');
	//Hide "Licenzo → Licenses".
	remove_submenu_page('licenzo-app', 'http://127.0.0.1/wp-admin/admin.php?page=licenzo-app#/licenses');
	//Hide "Licenzo → Settings".
	remove_submenu_page('licenzo-app', 'http://127.0.0.1/wp-admin/admin.php?page=licenzo-app#/settings');
}

add_action('admin_menu', 'plt_hide_licenzo_menus', 11);
Where do I put this code?