Add one stage pipeline to /ok

src/server.hpp

@@ -158,7 +158,7 @@ private:
   // Helper for processing a batch of connections with their events
   void process_connection_batch(int epollfd,
                                 std::span<std::unique_ptr<Connection>> batch,
-                                std::span<const int> events, bool is_new);
+                                std::span<const int> events);
 
   /**
    * Called internally to return ownership to the server.