cleanup, docs

site/doc/pages/1_RENDER.txt

@@ -40,7 +40,5 @@ In that case:
 - `WS(Request& context)` handles later WebSocket messages
 - `COMPONENT()` remains available only through the component helpers
 
-## Related Concepts
-
-- PHP: front controller entrypoints, template files, `include`, `require`, and route handlers that write the HTTP response
-- JavaScript / Node.js: Express or Fastify route handlers, page controller functions, and SSR entrypoints that build a response
+:example
+print("RENDER is a unit directive; place it at top level in a .uce unit.\n");