diff --git a/src/EasyCronJob.Abstractions/ICronConfiguration.cs b/src/EasyCronJob.Abstractions/ICronConfiguration.cs
index 95b6f93..8358a1e 100644
--- a/src/EasyCronJob.Abstractions/ICronConfiguration.cs
+++ b/src/EasyCronJob.Abstractions/ICronConfiguration.cs
@@ -1,9 +1,5 @@
 using Cronos;
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace EasyCronJob.Abstractions
 {