How to Hide the "Zoho Desk" Admin Menu

function plt_hide_integrate_with_zoho_desk_menus() {
	//Hide the "Zoho Desk" menu.
	remove_menu_page('integrate-with-zoho-desk');
}

add_action('admin_menu', 'plt_hide_integrate_with_zoho_desk_menus', 11);

Where do I put this code?