[doc] readme update

README.md

@@ -16,7 +16,6 @@ List of [running instances](https://github.com/asciimoo/searx/wiki/Searx-instanc
 * Supports csv output `curl https://searx.0x2a.tk/?format=csv&q=[query]`
 * Opensearch support (you can set as default search engine)
 * Configurable search engines/categories
-* User-agent forwarding
 
 ### Installation