Don't set keep_alive value.

The default is 5 minutes anyway.

profiler/src/profiler/TracyLlm.cpp

@@ -577,7 +577,6 @@ void TracyLlm::SendMessage( const ollama::messages& messages )
         req["messages"] = messages.to_json();
         req["stream"] = true;
         req["options"]["num_ctx"] = std::min( m_models[m_modelIdx].ctxSize, s_config.llmContext );
-        req["keep_alive"] = "5m";
 
         res = m_ollama->chat( req, [this]( const ollama::response& response ) -> bool { return OnResponse( response ); });
     }