[bugfix] interleaving sliding window for cohere2 model (#11583)

Signed-off-by: youkaichao <youkaichao@gmail.com>

tests/models/test_initialization.py

@@ -1,7 +1,6 @@
 from unittest.mock import patch
 
 import pytest
-import transformers
 from transformers import PretrainedConfig
 
 from vllm import LLM
@@ -12,9 +11,6 @@ from .registry import HF_EXAMPLE_MODELS
 @pytest.mark.parametrize("model_arch", HF_EXAMPLE_MODELS.get_supported_archs())
 def test_can_initialize(model_arch):
     model_info = HF_EXAMPLE_MODELS.get_hf_info(model_arch)
-    if (model_arch == "Cohere2ForCausalLM"
-            and transformers.__version__ < "4.48.0"):
-        pytest.skip(reason="Model introduced in HF >= 4.48.0")
     if not model_info.is_available_online:
         pytest.skip("Model is not available online")