diff --git a/a8/asiotcpclient.cc b/a8/asiotcpclient.cc
index cd949d1..9d7d8c7 100644
--- a/a8/asiotcpclient.cc
+++ b/a8/asiotcpclient.cc
@@ -87,20 +87,6 @@ namespace a8
 
     void AsioTcpClient::SetActive(bool active)
     {
-        if (active) {
-            if (IsActive()) {
-                return;
-            }
-            if (worker_thread_) {
-                ActiveStop();
-            }
-            worker_thread_shutdown_ = false;
-            worker_thread_ = new std::thread(&AsioTcpClient::WorkerThreadProc, this);
-        } else {
-            if (worker_thread_) {
-                ActiveStop();
-            }
-        }
     }
 
     bool AsioTcpClient::ActiveStart()
@@ -113,14 +99,6 @@ namespace a8
         connected_ = false;
     }
 
-    void AsioTcpClient::WorkerThreadProc()
-    {
-    }
-
-    void AsioTcpClient::SenderThreadProc()
-    {
-    }
-
     void AsioTcpClient::NotifySendCond()
     {
         std::unique_lock<std::mutex> lk(*send_cond_mutex_);
diff --git a/a8/asiotcpclient.h b/a8/asiotcpclient.h
index 061efe8..3f03ac9 100644
--- a/a8/asiotcpclient.h
+++ b/a8/asiotcpclient.h
@@ -30,9 +30,6 @@ namespace a8
         std::shared_ptr<asio::ip::tcp::resolver> resolver_;
         std::shared_ptr<asio::ip::tcp::socket> socket_;
         volatile bool connected_ = false;
-        volatile bool sender_thread_shutdown_ = false;
-        volatile bool worker_thread_shutdown_ = false;
-        std::thread* worker_thread_ = nullptr;
         std::mutex* send_buffer_mutex_ = nullptr;
         SendQueueNode *top_node_ = nullptr;
         SendQueueNode *bot_node_ = nullptr;
@@ -42,8 +39,6 @@ namespace a8
         void SetActive(bool active);
         bool ActiveStart();
         void ActiveStop();
-        void WorkerThreadProc();
-        void SenderThreadProc();
         void NotifySendCond();
     };