Merge pull request #16075 from woocommerce/refactor/remove-legacy-code

Removed PayPal legacy code

includes/gateways/paypal/includes/class-wc-gateway-paypal-response.php

@@ -23,11 +23,6 @@ abstract class WC_Gateway_Paypal_Response {
 			$order_id  = $custom->order_id;
 			$order_key = $custom->order_key;
 
-		// Fallback to serialized data if safe. This is @deprecated in 2.3.11
-		} elseif ( preg_match( '/^a:2:{/', $raw_custom ) && ! preg_match( '/[CO]:\+?[0-9]+:"/', $raw_custom ) && ( $custom = maybe_unserialize( $raw_custom ) ) ) {
-			$order_id  = $custom[0];
-			$order_key = $custom[1];
-
 		// Nothing was found.
 		} else {
 			WC_Gateway_Paypal::log( 'Order ID and key were not found in "custom".', 'error' );