function astra_force_remove_style() {
    add_filter( 'print_styles_array', function($styles) {

        // Set styles to remove.
        $styles_to_remove = array('astra-theme-css', 'astra-addon-css');
        if(is_array($styles) AND count($styles) > 0){
            foreach($styles AS $key => $code){
                if(in_array($code, $styles_to_remove)){
                    unset($styles[$key]);
                }
            }
        }
        return $styles;
    });
}
add_action('wp_enqueue_scripts', 'astra_force_remove_style', 99);