Remove release_back_to_server

src/server.hpp

@@ -95,19 +95,6 @@ struct Server {
    */
   int create_local_connection();
 
-  /**
-   * Release a connection back to its server for continued processing.
-   *
-   * This static method safely returns ownership of a connection back to its
-   * server. If the server has been destroyed, the connection will be safely
-   * cleaned up.
-   *
-   * This method is thread-safe and can be called from any thread.
-   *
-   * @param connection unique_ptr to the connection being released back
-   */
-  static void release_back_to_server(Ref<Connection> connection);
-
 private:
   friend struct Connection;
   /**