Rehooking should be done using add_action().

functions.php

<?php
add_action( 'wp' , 'wc_order_tabs' );

function wc_order_tabs() {
    
    // Remove tabs
		
    remove_action( 'woocommerce_product_tabs', 		'woocommerce_product_description_tab', 10 );
    remove_action( 'woocommerce_product_tabs', 		'woocommerce_product_attributes_tab', 20 );
    remove_action( 'woocommerce_product_tabs', 		'woocommerce_product_reviews_tab', 30 );

    // Re-hook with different priorities. See the final args (10, 20, 30) - thats the order they get rendered.

    add_action( 'woocommerce_product_tabs', 		'woocommerce_product_description_tab', 20 );
    add_action( 'woocommerce_product_tabs', 		'woocommerce_product_attributes_tab', 10 );
    add_action( 'woocommerce_product_tabs', 		'woocommerce_product_reviews_tab', 30 );
}