Fix accuracy test (#1051)

python/sglang/test/simple_eval_humaneval.py

@@ -6,21 +6,15 @@ Mark Chen and Jerry Tworek and Heewoo Jun and Qiming Yuan and Henrique Ponde de
 https://arxiv.org/abs/2107.03374 https://github.com/openai/human-eval/ 
 """
 
-import json
-import logging
-import multiprocessing
 import random
 import re
-from collections import Counter, defaultdict
 from concurrent.futures import ThreadPoolExecutor, as_completed
-from io import BytesIO
-from typing import Any, Dict, List, Tuple
+from typing import Dict, List
 
-import blobfile as bf
 import tqdm
 
 try:
-    from human_eval.data import HUMAN_EVAL, read_problems
+    from human_eval.data import read_problems
     from human_eval.evaluation import estimate_pass_at_k
     from human_eval.execution import check_correctness  # , unsafe_execute
 except (ImportError, ModuleNotFoundError):