How to Hide Custom Twitter Feeds Admin Menus

function plt_hide_custom_twitter_feeds_menus() {
	//Hide "Twitter Feeds".
	remove_menu_page('custom-twitter-feeds');
	//Hide "Twitter Feeds → Twitter Feeds".
	remove_submenu_page('custom-twitter-feeds', 'custom-twitter-feeds');
	//Hide "Twitter Feeds → Customize".
	remove_submenu_page('custom-twitter-feeds', 'custom-twitter-feeds-customize');
	//Hide "Twitter Feeds → Style".
	remove_submenu_page('custom-twitter-feeds', 'custom-twitter-feeds-style');
	//Hide "Twitter Feeds → Instagram Feed".
	remove_submenu_page('custom-twitter-feeds', 'admin.php?page=custom-twitter-feeds&tab=more');
	//Hide "Twitter Feeds → Facebook Feed".
	remove_submenu_page('custom-twitter-feeds', 'admin.php?page=custom-twitter-feeds&tab=more');
	//Hide "Twitter Feeds → YouTube Feed".
	remove_submenu_page('custom-twitter-feeds', 'admin.php?page=custom-twitter-feeds&tab=more');
	//Hide "Twitter Feeds → Social Wall".
	remove_submenu_page('custom-twitter-feeds', 'ctf-sw');
	//Hide "Twitter Feeds → Try the Pro Demo".
	remove_submenu_page('custom-twitter-feeds', 'https://smashballoon.com/custom-twitter-feeds/demo/?utm_campaign=twitter-free&utm_source=menu-link&utm_medium=upgrade-link');
}

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

Where do I put this code?