MAGETWO-86259: [Backport #12668 into 2.1-develop] Fix for reverting stock twice for cancelled orders #12952

 - Merge Pull Request #12952 from dverkade/magento2:2.1-Fix-for-reverting-stock-twice-for-cancelled-orders
 - Merged commits:
   1. bbe2f1a
   2. b5b59be

Author: Oleksii Korshenko

app/code/Magento/CatalogInventory/etc/events.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!--
 /**
- * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * Copyright © 2013-2018 Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
 -->
@@ -27,9 +27,6 @@
     <event name="sales_model_service_quote_submit_failure">
         <observer name="inventory" instance="Magento\CatalogInventory\Observer\RevertQuoteInventoryObserver"/>
     </event>
-    <event name="restore_quote">
-        <observer name="inventory" instance="Magento\CatalogInventory\Observer\RevertQuoteInventoryObserver"/>
-    </event>
     <event name="sales_order_item_cancel">
         <observer name="inventory" instance="Magento\CatalogInventory\Observer\CancelOrderItemObserver"/>
     </event>