Remove models variable from base URL output

- Remove the deprecated models field from /v1/info endpoint
- The models field was kept for back-compatibility but is now removed
- Users should use the dedicated /v1/models endpoint instead

Fixes #184

routstr/core/main.py

@@ -149,7 +149,6 @@ async def info() -> dict:
         "mints": global_settings.cashu_mints,
         "http_url": global_settings.http_url,
         "onion_url": global_settings.onion_url,
-        "models": [],  # kept for back-compat; prefer /v1/models
     }
 
 
@@ -163,4 +162,4 @@ app.include_router(admin_router)
 app.include_router(balance_router)
 app.include_router(deprecated_wallet_router)
 app.include_router(providers_router)
-app.include_router(proxy_router)
+app.include_router(proxy_router)