MAGETWO-53070: Can not unassign product from all websites

Author: Dmytro Voskoboinikov

app/code/Magento/Catalog/Controller/Adminhtml/Product/Initialization/Helper.php

@@ -170,10 +170,6 @@ public function initializeFromData(\Magento\Catalog\Model\Product $product, arra
             $product->lockAttribute('media');
         }
 
-        if ($this->storeManager->hasSingleStore() && empty($product->getWebsiteIds())) {
-            $product->setWebsiteIds([$this->storeManager->getStore(true)->getWebsite()->getId()]);
-        }
-
         /**
          * Check "Use Default Value" checkboxes values
          */