How to Hide ImagePilot Pro Admin Menus

function plt_hide_imagepilot_menus() {
	//Hide "ImagePilot".
	remove_menu_page('imagepilot');
	//Hide "ImagePilot → ImagePilot".
	remove_submenu_page('imagepilot', 'imagepilot');
	//Hide "ImagePilot → Contact Us".
	remove_submenu_page('imagepilot', 'imagepilot-contact');
	//Hide "ImagePilot → Upgrade".
	remove_submenu_page('imagepilot', 'imagepilot-pricing');
}

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

Where do I put this code?