移除DeviceManager.cs中错误的心跳机制实现

Windows/CS/Framework4.0/Toprie/Toprie/DeviceManager.cs

@@ -1222,21 +1222,6 @@ namespace JoyD.Windows.CS.Toprie
                         if (DateTime.Now - lastConnectionCheckTime > TimeSpan.FromSeconds(30))
                         {
                             Log("定期检查温度数据连接状态");
-                            // 尝试发送一个简单的心跳消息到TCP连接
-                            try
-                            {
-                                if (localStream != null && localStream.CanWrite)
-                                {
-                                    byte[] heartbeat = Encoding.ASCII.GetBytes("heartbeat\r\n");
-                                    localStream.Write(heartbeat, 0, heartbeat.Length);
-                                    localStream.Flush();
-                                    Log("温度数据连接心跳发送成功");
-                                }
-                            }
-                            catch (Exception ex)
-                            {
-                                Log($"温度数据连接心跳发送失败: {ex.Message}，可能需要重新连接");
-                            }
                             lastConnectionCheckTime = DateTime.Now;
                         }
                     }