function plt_hide_wp_auto_republish_menus() {
//Hide "RevivePress".
remove_menu_page('revivepress');
//Hide "RevivePress → Dashboard".
remove_submenu_page('revivepress', 'revivepress');
//Hide "RevivePress → Scheduled Tasks".
remove_submenu_page('revivepress', 'revivepress-scheduled-tasks');
//Hide "RevivePress → Contact Us".
remove_submenu_page('revivepress', 'revivepress-contact');
//Hide "RevivePress → Upgrade".
remove_submenu_page('revivepress', 'revivepress-pricing');
}
add_action('admin_menu', 'plt_hide_wp_auto_republish_menus', 1000000000);