Remove unused User-Agent header from RewardFunction

Co-authored-by: dhuang <dhuang@fireworks.ai>

Author: cursoragent

eval_protocol/reward_function.py

@@ -9,7 +9,6 @@
 
 import requests
 
-from .common_utils import get_user_agent
 from .models import EvaluateResult, MetricResult
 from .typed_interface import reward_function
 
@@ -212,7 +211,6 @@ def __call__(
             headers = {
                 "Content-Type": "application/json",
                 "Authorization": f"Bearer {api_key}" if api_key else "",
-                "User-Agent": get_user_agent(),
             }
 
             try: