change-cross-sells-products.php

<?php
//Remove cross sells products
remove_action( 'woocommerce_cart_collaterals', 'woocommerce_cross_sell_display' );
//Change cross sells columns number
add_filter( 'woocommerce_cross_sells_columns', 'musilda_change_cross_sells_columns' ); 
function musilda_change_cross_sells_columns( $columns ) {
    return 3;
}
//Change number of cross sell products
add_filter( 'woocommerce_cross_sells_total', 'musilda_change_cross_sells_product_number' );
function musilda_change_cross_sells_product_number( $columns ) {
    return 3;
}