MAGETWO-59325: Unable to add custom attribute to product

- Removed unused variable;

Author: adifucan

app/code/Magento/Catalog/Controller/Adminhtml/Product/AddAttributeToTemplate.php

@@ -16,7 +16,6 @@
 use Magento\Eav\Api\Data\AttributeInterface;
 use Magento\Eav\Api\Data\AttributeSetInterface;
 use Magento\Framework\Api\SearchCriteriaBuilder;
-use Magento\Framework\Api\SortOrderBuilder;
 use Magento\Framework\Exception\LocalizedException;
 use Psr\Log\LoggerInterface;
 use Magento\Framework\Api\ExtensionAttributesFactory;
@@ -53,11 +52,6 @@ class AddAttributeToTemplate extends \Magento\Catalog\Controller\Adminhtml\Produ
      */
     protected $searchCriteriaBuilder;
 
-    /**
-     * @var SortOrderBuilder
-     */
-    protected $sortOrderBuilder;
-
     /**
      * @var AttributeGroupInterfaceFactory
      */