MAGETWO-82854: [Backport 2.2-develop] Fix AccountManagementTest test

 fail randomly magento/magento2#11607

Author: ishakhsuvarov

app/code/Magento/Customer/Test/Unit/Model/AccountManagementTest.php

@@ -1606,8 +1606,6 @@ public function testCreateAccountWithPasswordHashWithCustomerAddresses()
         $storeId = 1;
         $hash = '4nj54lkj5jfi03j49f8bgujfgsd';
 
-        $datetime = $this->prepareDateTimeFactory();
-
         //Handle store
         $store = $this->getMockBuilder(\Magento\Store\Model\Store::class)->disableOriginalConstructor()->getMock();
         $store->expects($this->any())