clean code

Former-commit-id: f54cafd5c7f0383370d1a2f357834a61a97397ce

src/llamafactory/model/model_utils/attention.py

@@ -1,7 +1,8 @@
 from typing import TYPE_CHECKING
 
+from transformers.utils import is_flash_attn_2_available, is_torch_sdpa_available
+
 from ...extras.logging import get_logger
-from ...extras.packages import is_flash_attn2_available, is_sdpa_available
 
 
 if TYPE_CHECKING:
@@ -21,13 +22,13 @@ def configure_attn_implementation(config: "PretrainedConfig", model_args: "Model
         requested_attn_implementation = "eager"
 
     elif model_args.flash_attn == "sdpa":
-        if not is_sdpa_available():
+        if not is_torch_sdpa_available():
             logger.warning("torch>=2.1.1 is required for SDPA attention.")
             return
 
         requested_attn_implementation = "sdpa"
     elif model_args.flash_attn == "fa2":
-        if not is_flash_attn2_available():
+        if not is_flash_attn_2_available():
             logger.warning("FlashAttention-2 is not installed.")
             return