Remove unused tmpdir var in TJAlienConnectionManager

inc/TJAlienConnectionManager.h

@@ -36,7 +36,6 @@ struct lws_context_creation_info;
 class TJAlienConnectionManager {
 private:
     std::string homedir; // local home directory
-    std::string tmpdir;  // tmp directory
     const int default_WSport = 8097;
 
     const std::string default_server = DEFAULT_JCENTRAL_SERVER;