Move legacy classes to correct dir

includes/abstracts/abstract-wc-order.php

@@ -3,7 +3,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
-include_once( 'abstract-wc-legacy-order.php' );
+include_once( WC_ABSPATH . 'includes/legacy/abstract-wc-legacy-order.php' );
 
 /**
  * Abstract Order

includes/abstracts/abstract-wc-payment-token.php

@@ -1,10 +1,10 @@
 <?php
-include_once( 'abstract-wc-legacy-payment-token.php' );
-
 if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
+include_once(  WC_ABSPATH . 'includes/legacy/abstract-wc-legacy-payment-token.php' );
+
 /**
  * WooCommerce Payment Token.
  *

includes/abstracts/abstract-wc-product.php

@@ -7,7 +7,7 @@ if ( ! defined( 'ABSPATH' ) ) {
  * Legacy product contains all deprecated methods for this class and can be
  * removed in the future.
  */
-include_once( 'abstract-wc-legacy-product.php' );
+include_once( WC_ABSPATH . 'includes/legacy/abstract-wc-legacy-product.php' );
 
 /**
  * Abstract Product Class