How to Hide Smash Balloon Instagram Feed Admin Menus

function plt_hide_instagram_feed_menus() {
	//Hide the "Instagram Feed" menu.
	remove_menu_page('sb-instagram-feed');
	//Hide the "Instagram Feed → Settings" menu.
	remove_submenu_page('sb-instagram-feed', 'sb-instagram-feed');
	//Hide the "Instagram Feed → About Us" menu.
	remove_submenu_page('sb-instagram-feed', 'sb-instagram-feed-about');
}

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

Where do I put this code?