add import_utils

tests/test_common_gpu.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import gc
-import importlib
 import unittest
 
 import pytest
@@ -21,14 +20,11 @@ import torch
 from transformers import AutoModelForCausalLM, AutoModelForSeq2SeqLM, AutoTokenizer, WhisperForConditionalGeneration
 
 from peft import LoraConfig, PeftModel, get_peft_model
+from peft.utils import is_bnb_available
 
 from .testing_utils import require_bitsandbytes, require_torch_gpu, require_torch_multi_gpu
 
 
-def is_bnb_available():
-    return importlib.util.find_spec("bitsandbytes") is not None
-
-
 if is_bnb_available():
     from peft.tuners.lora import Linear8bitLt