Fix lint

Author: slkoo-cc

pydantic_ai_slim/pydantic_ai/models/__init__.py

@@ -638,7 +638,6 @@ class ModelClassInformation:
 
 def infer_provider_model_class(model: KnownModelName | str) -> ModelClassInformation:
     """Infer the model and provider from the name."""
-
     if model == 'test':
         from .test import TestModel