[Fix] Remove unused Type import in gpt_j.py (#17975)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

python/sglang/srt/models/gpt_j.py

@@ -16,7 +16,7 @@
 # https://github.com/vllm-project/vllm/blob/main/vllm/model_executor/models/gpt_j.py
 """Inference-only GPT-J model compatible with HuggingFace weights."""
 
-from typing import Iterable, Optional, Tuple, Type
+from typing import Iterable, Optional, Tuple
 
 import torch
 from torch import nn