diff --git a/gim/business.ext.proto b/gim/business.ext.proto
index bc01a31..c8e7b22 100644
--- a/gim/business.ext.proto
+++ b/gim/business.ext.proto
@@ -2,8 +2,6 @@ syntax = "proto3";
 package pb;
 option go_package = "gim/pkg/pb/";
 
-message Empty{}
-
 service BusinessExt {
   // 登录
   rpc SignIn (SignInReq) returns (SignInResp);