chore(pre-commit): remove flake8 hook

Authored by OpenClaw (model: gpt-5.2)

Author: njzjz-bot

.pre-commit-config.yaml

@@ -39,14 +39,6 @@ repos:
       - id: ruff-format
         exclude: ^source/3rdparty
         types_or: [python, pyi, jupyter]
-  - repo: https://github.com/pycqa/flake8
-    # flake8 cannot autofix
-    rev: "7.3.0"
-    hooks:
-      - id: flake8
-        additional_dependencies:
-          - torchfix==0.7.0
-          - flake8-pyproject==1.2.3
   # numpydoc
   - repo: https://github.com/Carreau/velin
     rev: 0.0.12