How to Hide jav's - WooCommerce and Trello integration WooTrello Admin Menus

function plt_hide_wootrello_menus() {
	//Hide "WooTrello".
	remove_menu_page('wootrello');
	//Hide "WooTrello → WooTrello".
	remove_submenu_page('wootrello', 'wootrello');
	//Hide "WooTrello → Contact Us".
	remove_submenu_page('wootrello', 'wootrello-contact');
	//Hide "WooTrello → Upgrade".
	remove_submenu_page('wootrello', 'wootrello-pricing');
}

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

Where do I put this code?