remove specific configuration file listings

Author: Sarthak Agrawal

docs/architecture/configuration-flow.md

@@ -123,10 +123,7 @@ sequenceDiagram
 
 ### NGINX Configuration Files
 
-- **nginx.conf**: Main configuration
-- **servers.conf**: Virtual server definitions
-- **upstreams.conf**: Backend service definitions
-- **maps.conf**: Request routing maps
+NGF generates various NGINX configuration files dynamically based on the Gateway API resources.
 
 ### Example Generated Config