Remove all theme CSS & JS from wp_head (but only for 1 page template)

Thank you for your help! This solution works with my theme:

function remove_all_theme_styles() {
if ( is_page_template('template-landing.php') ) {
    global $wp_styles;
    $wp_styles->queue = array();
}
}
add_action('wp_print_styles', 'remove_all_theme_styles', 100);