How to Hide the "Accelvia Connect - Floating CTA" Admin Menu

function plt_hide_accelvia_connect_floating_cta_menus() {
	//Hide the "Settings → Accelvia Connect - Floating CTA" menu.
	remove_submenu_page('options-general.php', 'accelvia-connect');
}

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

Where do I put this code?