How to Hide Camoo SMS Admin Menus

function plt_hide_camoo_sms_menus() {
	//Hide "Camoo SMS".
	remove_menu_page('wp-camoo-sms');
	//Hide "Camoo SMS → Send SMS".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms');
	//Hide "Camoo SMS → Outbox".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-outbox');
	//Hide "Camoo SMS → Subscribers".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-subscribers');
	//Hide "Camoo SMS → Groups".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-subscribers-group');
	//Hide "Camoo SMS → System Info".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-system-info');
	//Hide "Camoo SMS → Top up your account".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-topup');
	//Hide "Camoo SMS → Settings".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-settings');
	//Hide "Camoo SMS → Camoo SMS Plus".
	remove_submenu_page('wp-camoo-sms', 'wp-camoo-sms-pro');
}

add_action('admin_menu', 'plt_hide_camoo_sms_menus', 12);
Where do I put this code?