WooCommerce: Remove related products when up-sell products are defined

WooCommerce: Remove related products when up-sell products are defined

remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_upsell_display', 15 );
remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20 );

add_action( 'woocommerce_after_single_product_summary', 'related_upsell_products', 15 );

function related_upsell_products() {
	global $product;

	if ( isset( $product ) && is_product() ) {
		$upsells = version_compare( WC_VERSION, '3.0', '<' ) ? $product->get_upsells() : $product->get_upsell_ids();

		if ( count( $upsells ) > 0 ) {
			woocommerce_upsell_display();	
		} else {
			woocommerce_upsell_display();
			woocommerce_output_related_products();
		}
	}
}