MAGETWO-90808: [Performance] Customer Import check data does not complete

Author: zakdma

app/code/Magento/CustomerImportExport/Model/Import/Address.php

@@ -168,14 +168,6 @@ class Address extends AbstractCustomer
      */
     protected $_attributeCollection;
 
-    /**
-     * Collection of existent addresses
-     *
-     * @var \Magento\Customer\Model\ResourceModel\Address\Collection
-     * @deprecated
-     */
-    protected $_addressCollection;
-
     /**
      * Store imported row primary keys
      *

app/code/Magento/CustomerImportExport/Model/ResourceModel/Import/Customer/Storage.php

@@ -15,22 +15,6 @@
 
 class Storage
 {
-    /**
-     *  Flag to not load collection more than one time
-     *
-     * @var bool
-     * @deprecated
-     */
-    protected $_isCollectionLoaded = false;
-
-    /**
-     * Customer collection
-     *
-     * @var \Magento\Customer\Model\ResourceModel\Customer\Collection
-     * @deprecated
-     */
-    protected $_customerCollection;
-
     /**
      * Existing customers information. In form of:
      *
@@ -84,28 +68,6 @@ public function __construct(
         $this->customerCollectionFactory = $collectionFactory;
     }
 
-    /**
-     * Load needed data from customer collection
-     *
-     * @return void
-     * @deprecated
-     * @see prepareCustomers
-     */
-    public function load()
-    {
-        if ($this->_isCollectionLoaded == false) {
-            $connection = $this->_customerCollection->getConnection();
-            $select = $connection->select();
-            $select->from($this->_customerCollection->getMainTable(), ['entity_id', 'website_id', 'email']);
-            $results = $connection->fetchAll($select);
-            foreach ($results as $customer) {
-                $this->addCustomerByArray($customer);
-            }
-
-            $this->_isCollectionLoaded = true;
-        }
-    }
-
     /**
      * Create new collection to load customer data with proper filters.
      *