diff --git a/core/lib/Drupal/Core/Database/Query/Condition.php b/core/lib/Drupal/Core/Database/Query/Condition.php
index 0d0ec48187..ad64622303 100644
--- a/core/lib/Drupal/Core/Database/Query/Condition.php
+++ b/core/lib/Drupal/Core/Database/Query/Condition.php
@@ -73,13 +73,6 @@ class Condition implements ConditionInterface, \Countable {
    */
   protected $stringVersion;
 
-  /**
-   * The build sql select query.
-   *
-   * @var \Drupal\Core\Database\Query\SelectInterface|null
-   */
-  public $sqlQuery;
-
   /**
    * Constructs a Condition object.
    *
diff --git a/core/lib/Drupal/Core/Entity/Query/Sql/Condition.php b/core/lib/Drupal/Core/Entity/Query/Sql/Condition.php
index 4d70b1e456..b09f0a0c46 100644
--- a/core/lib/Drupal/Core/Entity/Query/Sql/Condition.php
+++ b/core/lib/Drupal/Core/Entity/Query/Sql/Condition.php
@@ -40,8 +40,6 @@ public function compile($conditionContainer) {
     foreach ($this->conditions as $condition) {
       if ($condition['field'] instanceof ConditionInterface) {
         $sql_condition = $sql_query->getConnection()->condition($condition['field']->getConjunction());
-        // Add the SQL query to the object before calling this method again.
-        $sql_condition->sqlQuery = $sql_query;
         $condition['field']->nestedInsideOrCondition = $this->nestedInsideOrCondition || strtoupper($this->conjunction) === 'OR';
         $condition['field']->compile($sql_condition);
         $conditionContainer->condition($sql_condition);