Woocommerce remove a function from different plugin

add_action( 'woocommerce_before_calculate_totals', 'remove_discount_using_dynamic_instance', 20 );
 function remove_discount_using_dynamic_instance() {
    global $wp_filter;
     if ( isset( $wp_filter['woocommerce_cart_calculate_fees'] ) ) {
        foreach ( $wp_filter['woocommerce_cart_calculate_fees']->callbacks as $priority => $callbacks ) {
            foreach ( $callbacks as $callback_key => $callback ) {
                if ( is_array( $callback['function'] ) 
                     && $callback['function'][1] === 'FUNCTION_NAME_TO_REMOVE' 
                     && is_checkout() ) {
                    remove_action( 'woocommerce_cart_calculate_fees', $callback['function'], $priority );
                }
            }
        }
    }
}