fix kwargs access to "model"

Author: Dylan Huang

eval_protocol/pytest/evaluation_test.py

@@ -308,7 +308,6 @@ def create_wrapper_with_signature() -> Callable:
             invocation_id = generate_id()
 
             async def wrapper_body(**kwargs):
-                model_name = kwargs["model"]
                 eval_metadata = None
                 all_results: List[List[EvaluationRow]] = [[] for _ in range(num_runs)]