Revert removing the unused imports (#385)

python/sglang/srt/models/llava.py

@@ -5,7 +5,7 @@ from typing import List, Optional
 import numpy as np
 import torch
 from torch import nn
-from transformers import CLIPVisionModel, LlavaConfig
+from transformers import CLIPVisionModel, LlamaConfig, LlavaConfig
 from transformers.models.llava.modeling_llava import LlavaMultiModalProjector
 from vllm.model_executor.layers.linear import LinearMethodBase
 from vllm.model_executor.weight_utils import (