function plt_hide_advanced_scrollbar_menus() {
//Hide the "Settings → Advanced Scrollbar Settings" menu.
remove_submenu_page('options-general.php', 'advanced-scrollbar');
//Hide the "Settings → Upgrade" menu.
remove_submenu_page('options-general.php', 'advanced-scrollbar-pricing');
}
add_action('admin_menu', 'plt_hide_advanced_scrollbar_menus', 1000000000);