[Misc] Remove OLMo2 config copy (#17066)

Signed-off-by: Isotr0py <2037008807@qq.com>

vllm/model_executor/models/olmo2.py

@@ -28,6 +28,7 @@ from typing import Iterable, Optional, Tuple, Union
 
 import torch
 from torch import nn
+from transformers import Olmo2Config
 
 from vllm.attention import Attention
 from vllm.config import VllmConfig
@@ -51,7 +52,6 @@ from vllm.model_executor.models.utils import (
     make_layers, maybe_prefix)
 from vllm.model_executor.sampling_metadata import SamplingMetadata
 from vllm.sequence import IntermediateTensors
-from vllm.transformers_utils.configs.olmo2 import Olmo2Config
 
 
 class Olmo2Attention(nn.Module):