function plt_hide_wordpress_move_menus() {
//Hide the "Settings → WordPress Move" menu.
remove_submenu_page('options-general.php', 'wpmove-settings');
//Hide the "Tools → Migration Assistant" menu.
remove_submenu_page('tools.php', 'wpmove');
//Hide the "Tools → Backup Manager" menu.
remove_submenu_page('tools.php', 'wpmove-backup-manager');
}
add_action('admin_menu', 'plt_hide_wordpress_move_menus', 11);