function plt_hide_rssemble_cards_for_rss_feeds_menus() {
//Hide the "Settings → Rssemble Cards" menu.
remove_submenu_page('options-general.php', 'rssemble-cards-for-rss-feeds');
}
add_action('admin_menu', 'plt_hide_rssemble_cards_for_rss_feeds_menus', 11);