Prevent running SQL query on every item in the database when the quote is empty

Author: LordZardeck

app/code/Magento/Quote/Model/ResourceModel/Quote/Item/Collection.php

@@ -309,6 +309,10 @@ private function addTierPriceData(ProductCollection $productCollection)
      */
     private function removeItemsWithAbsentProducts()
     {
+        if (count($this->_productIds) === 0) {
+            return;
+        }
+
         $productCollection = $this->_productCollectionFactory->create()->addIdFilter($this->_productIds);
         $existingProductsIds = $productCollection->getAllIds();
         $absentProductsIds = array_diff($this->_productIds, $existingProductsIds);