How to Hide OXP Breaking News Ticker Admin Menus

function plt_hide_oxp_breaking_news_ticker_menus() {
	//Hide "OXP Tickers".
	remove_menu_page('edit.php?post_type=oxpbnt_ticker');
	//Hide "OXP Tickers → My Tickers".
	remove_submenu_page('edit.php?post_type=oxpbnt_ticker', 'edit.php?post_type=oxpbnt_ticker');
	//Hide "OXP Tickers → New Ticker".
	remove_submenu_page('edit.php?post_type=oxpbnt_ticker', 'post-new.php?post_type=oxpbnt_ticker');
	//Hide "OXP Tickers → Settings".
	remove_submenu_page('edit.php?post_type=oxpbnt_ticker', 'oxpbnt-settings');
	//Hide "OXP Tickers → Upgrade".
	remove_submenu_page('edit.php?post_type=oxpbnt_ticker', 'oxp-breaking-news-ticker-pricing');
}

add_action('admin_menu', 'plt_hide_oxp_breaking_news_ticker_menus', 1000000000);
Where do I put this code?