Remove flash attention (#269)

Author: ebetica

pixi.lock

@@ -44,8 +44,8 @@ dependencies = [
   "boto3",
   "pygtrie",
   "dna_features_viewer",
-  "flash-attn @ https://github.com/Dao-AILab/flash-attention/releases/download/v2.8.1/flash_attn-2.8.1+cu12torch2.7cxx11abiFALSE-cp312-cp312-linux_x86_64.whl"
 ]
+
 # Pytest
 [tool.pytest.ini_options]
 addopts = """