Align inference env vars with submission checklist

inference.py

@@ -21,7 +21,7 @@ from cleanops_env.tasks import list_task_ids
 
 API_BASE_URL = os.getenv("API_BASE_URL", "https://router.huggingface.co/v1")
 MODEL_NAME = os.getenv("MODEL_NAME", "Qwen/Qwen2.5-72B-Instruct")
-HF_TOKEN = os.getenv("HF_TOKEN") or os.getenv("OPENAI_API_KEY") or os.getenv("API_KEY")
+HF_TOKEN = os.getenv("HF_TOKEN")
 LOCAL_IMAGE_NAME = os.getenv("LOCAL_IMAGE_NAME")
 TASK_NAME = os.getenv("TASK_NAME", "all")
 BENCHMARK = os.getenv("BENCHMARK", "cleanops_env")