fix: remove unused variable (again)

src/unlocker/proxy.cpp

@@ -534,7 +534,6 @@ void Proxy::handleClient(SOCKET hClientSocket)
                         if (!pendingUrls.empty()) pendingUrls.pop_front();
 
                         std::string respHeaders = serverStream.buffer.substr(0, bStart);
-                        size_t firstSpace = respHeaders.find(' ');
                         OnServerResponse.run(url, body, respHeaders);
 
                         removeHeader(respHeaders, "Transfer-Encoding");