diff --git a/library/think/model/Relation.php b/library/think/model/Relation.php
index b5fde757..fd29647b 100644
--- a/library/think/model/Relation.php
+++ b/library/think/model/Relation.php
@@ -444,29 +444,6 @@ class Relation
             ->where($condition);
     }
 
-    /**
-     * 删除当前关联数据对象
-     * @access public
-     * @param mixed $where 删除条件 一对多删除可以指定条件 多对多可以使用关联对象的主键删除
-     * @return integer
-     */
-    public function delete($where = [])
-    {
-        // 判断关联类型
-        switch ($this->type) {
-            case self::HAS_ONE:
-            case self::BELONGS_TO:
-            case self::HAS_MANY:
-                // 保存关联表数据
-                $where[$this->foreignKey] = $this->parent->{$this->localKey};
-                $model                    = $this->model;
-                return $model::where($where)->delete();
-            case self::BELONGS_TO_MANY:
-                // 删除关联表/中间表数据
-                return $this->detach($where);
-        }
-    }
-
     /**
      * 保存（新增）当前关联数据对象
      * @access public