MAGETWO-85698: Remove deprecation without alternative #11070

 - Merge Pull Request magento/magento2#11070 from schmengler/magento2:undeprecate-cart
 - Merged commits:
   1. e5479b4e

app/code/Magento/Checkout/Model/Cart.php

@@ -13,9 +13,10 @@ use Magento\Framework\Exception\NoSuchEntityException;
 
 /**
  * Shopping cart model
+ *
  * @api
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
- * @deprecated 100.1.0
+ * @deprecated 100.1.0 Use \Magento\Quote\Model\Quote instead
  */
 class Cart extends DataObject implements CartInterface
 {

app/code/Magento/Checkout/Model/Cart/CartInterface.php

@@ -12,7 +12,7 @@ use Magento\Quote\Model\Quote;
  *
  * @api
  * @author      Magento Core Team <core@magentocommerce.com>
- * @deprecated 100.1.0
+ * @deprecated 100.1.0 Use \Magento\Quote\Model\Quote instead
  */
 interface CartInterface
 {