diff --git a/app/code/Magento/Cms/Model/ResourceModel/Block/Grid/Collection.php b/app/code/Magento/Cms/Model/ResourceModel/Block/Grid/Collection.php
index bfebd180be054..f633c1df5bd4e 100644
--- a/app/code/Magento/Cms/Model/ResourceModel/Block/Grid/Collection.php
+++ b/app/code/Magento/Cms/Model/ResourceModel/Block/Grid/Collection.php
@@ -84,19 +84,6 @@ public function setAggregations($aggregations)
         $this->aggregations = $aggregations;
     }
 
-    /**
-     * Retrieve all ids for collection
-     * Backward compatibility with EAV collection
-     *
-     * @param int $limit
-     * @param int $offset
-     * @return array
-     */
-    public function getAllIds($limit = null, $offset = null)
-    {
-        return $this->getConnection()->fetchCol($this->_getAllIdsSelect($limit, $offset), $this->_bindParams);
-    }
-
     /**
      * Get search criteria.
      *