remove bill_to in get available model provider

backend/tasks/get_available_model_provider.py

@@ -50,7 +50,7 @@ def test_provider(model_name: str, provider: str, verbose: bool = False) -> bool
             model=model_name,
             token=hf_token,
             provider=provider,
-            bill_to=hf_organization,
+            # bill_to=hf_organization,
             timeout=10  # Increased timeout to allow model loading
         )