// Add to your theme's functions.php file. De-queues Select2 styles & scripts. Useful to keep Boostrap form control formatting

/**
 * Remove Woocommerce Select2 - Pre WC 3.2.1-ish
 */
function woo_dequeue_select2() {
    if ( class_exists( 'woocommerce' ) ) {
        wp_dequeue_style( 'select2' );
        wp_deregister_style( 'select2' );

        wp_dequeue_script( 'select2');
        wp_deregister_script('select2');
    } 
}
add_action( 'wp_enqueue_scripts', 'woo_dequeue_select2', 100 );

/**
 * Remove Woocommerce Select2 - Woocommerce 3.2.1+
 */
function woo_dequeue_select2() {
    if ( class_exists( 'woocommerce' ) ) {
        wp_dequeue_style( 'select2' );
        wp_deregister_style( 'select2' );

        wp_dequeue_script( 'selectWoo');
        wp_deregister_script('selectWoo');
    } 
}
add_action( 'wp_enqueue_scripts', 'woo_dequeue_select2', 100 );