diff --git a/Tun/Punchnet/SDLUDPHole.swift b/Tun/Punchnet/SDLUDPHole.swift
index a6333d8..1425e1f 100644
--- a/Tun/Punchnet/SDLUDPHole.swift
+++ b/Tun/Punchnet/SDLUDPHole.swift
@@ -31,11 +31,6 @@ final class SDLUDPHole: ChannelInboundHandler {
     // 解决channelready的问题
     private var cont: CheckedContinuation<Void, Never>?
     private var isReady: Bool = false
-
-    enum HoleEvent {
-        case ready
-        case closed
-    }
     
     // 启动函数
     init() throws {