Update modeling_phi.py

modeling_phi.py

@@ -47,9 +47,11 @@ from transformers.utils import (
 from .configuration_phi import PhiConfig
 
 
-if is_flash_attn_2_available():
+try:
     from flash_attn import flash_attn_func, flash_attn_varlen_func
     from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input  # noqa
+except:
+    pass
 
 
 logger = logging.get_logger(__name__)