diff --git a/Engine/Attributes/LCEngineFunctionAttribute.cs b/Engine/Attributes/LCEngineFunctionAttribute.cs
index a9542dd..1f4ddb0 100644
--- a/Engine/Attributes/LCEngineFunctionAttribute.cs
+++ b/Engine/Attributes/LCEngineFunctionAttribute.cs
@@ -14,18 +14,4 @@ namespace LeanCloud.Engine {
             FunctionName = funcName;
         }
     }
-
-    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false)]
-    public class LCEngineFunctionParameterAttribute : Attribute {
-        public string ParameterName {
-            get;
-        }
-
-        public LCEngineFunctionParameterAttribute(string paramName) {
-            if (string.IsNullOrEmpty(paramName)) {
-                throw new ArgumentNullException(nameof(paramName));
-            }
-            ParameterName = paramName;
-        }
-    }
 }