MAGETWO-66793: [Backport] Merchant can't unsubscribe Customer from Newsletter in Admin

Author: Oleksandr Iegorov

app/code/Magento/Newsletter/Model/Subscriber.php

@@ -10,7 +10,6 @@
 use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Exception\MailException;
 use Magento\Framework\Exception\NoSuchEntityException;
-use Magento\Framework\Stdlib\DateTime\DateTime;
 
 /**
  * Subscriber model
@@ -96,7 +95,7 @@ class Subscriber extends \Magento\Framework\Model\AbstractModel
     /**
      * Date
      *
-     * @var DateTime
+     * @var \Magento\Framework\Stdlib\DateTime\DateTime
      */
     private $dateTime;
 
@@ -143,7 +142,7 @@ class Subscriber extends \Magento\Framework\Model\AbstractModel
      * @param \Magento\Framework\Model\ResourceModel\AbstractResource|null $resource
      * @param \Magento\Framework\Data\Collection\AbstractDb|null $resourceCollection
      * @param array $data
-     * @param DateTime|null $dateTime
+     * @param \Magento\Framework\Stdlib\DateTime\DateTime|null $dateTime
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      */
     public function __construct(
@@ -160,7 +159,7 @@ public function __construct(
         \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
         \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
         array $data = [],
-        DateTime $dateTime = null
+        \Magento\Framework\Stdlib\DateTime\DateTime $dateTime = null
     ) {
         $this->_newsletterData = $newsletterData;
         $this->_scopeConfig = $scopeConfig;
@@ -170,7 +169,8 @@ public function __construct(
         $this->customerRepository = $customerRepository;
         $this->customerAccountManagement = $customerAccountManagement;
         $this->inlineTranslation = $inlineTranslation;
-        $this->dateTime = $dateTime ?: ObjectManager::getInstance()->get(DateTime::class);
+        $this->dateTime = $dateTime
+            ?: ObjectManager::getInstance()->get(\Magento\Framework\Stdlib\DateTime\DateTime::class);
         parent::__construct($context, $registry, $resource, $resourceCollection, $data);
     }