server: (router) rework -hf preset repo (#24739)

* server: temporary remove HF remote preset

* rework remove preset.ini support

* rm unused get_remote_preset_whitelist()

* print warning

* add docs

* rm stray file

tools/server/server.cpp

@@ -349,6 +349,12 @@ int llama_server(int argc, char ** argv) {
         SRV_INF("router server is listening on %s\n", ctx_http.listening_address.c_str());
         SRV_WRN("%s", "NOTE: router mode is experimental\n");
         SRV_WRN("%s", "      it is not recommended to use this mode in untrusted environments\n");
+
+        if (!params.models_preset_hf.empty()) {
+            SRV_WRN(      "NOTE: using preset.ini from HF repo '%s'\n", params.models_preset_hf.c_str());
+            SRV_WRN("%s", "      please only use presets that you can trust! Unknown presets may be unsafe\n");
+        }
+
         if (ctx_http.thread.joinable()) {
             ctx_http.thread.join(); // keep the main thread alive
         }