function no_category_base_deactivate()
{
    remove_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
    // We don't want to insert our custom rules again
    no_category_base_refresh_rules();
}
function no_category_base_deactivate()
{
    remove_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
    no_category_base_refresh_rules();
}