ACPT-1451: Fix for CE functional tests failures

- fix for static tests

Author: vzabaznov

app/code/Magento/SalesRule/Model/ResourceModel/Rule/Collection.php

@@ -62,11 +62,6 @@ class Collection extends \Magento\Rule\Model\ResourceModel\Rule\Collection\Abstr
      */
     private $serializer;
 
-    /**
-     * @var MetadataPool $metadataPool
-     */
-    private $metadataPool;
-
     /**
      * @param \Magento\Framework\Data\Collection\EntityFactory $entityFactory
      * @param \Psr\Log\LoggerInterface $logger
@@ -91,10 +86,8 @@ public function __construct(
         parent::__construct($entityFactory, $logger, $fetchStrategy, $eventManager, $connection, $resource);
         $this->_date = $date;
         $this->serializer = $serializer ?: \Magento\Framework\App\ObjectManager::getInstance()->get(Json::class);
-        $this->metadataPool = $serializer ?:
-            \Magento\Framework\App\ObjectManager::getInstance()->get(MetadataPool::class);
         $this->_associatedEntitiesMap = $this->getAssociatedEntitiesMap();
-        $this->_setIdFieldName($this->metadataPool->getMetadata(RuleInterface::class)->getLinkField());
+        $this->_setIdFieldName($metadataPool->getMetadata(RuleInterface::class)->getLinkField());
     }
 
     /**

app/code/Magento/SalesRule/Model/Rule/Action/Discount/CartFixed.php

@@ -80,7 +80,6 @@ public function calculate($rule, $item, $qty)
 
         $ruleTotals = $this->validator->getRuleItemTotalsInfo($rule->getId());
         $baseRuleTotals = $ruleTotals['base_items_price'] ?? 0.0;
-        $baseRuleTotalsDiscount = $ruleTotals['base_items_discount_amount'] ?? 0.0;
         $ruleItemsCount = $ruleTotals['items_count'] ?? 0;
 
         $address = $item->getAddress();