Cease using flake8 (#13204)

.github/workflows/lint.yml

@@ -45,28 +45,6 @@ jobs:
     - name: Format with Ruff
       run: ruff format . --diff
 
-  flake8:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        persist-credentials: false
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: "3"
-    - name: Install uv
-      run: >
-        curl --no-progress-meter --location --fail
-        --proto '=https' --tlsv1.2
-        "https://astral.sh/uv/install.sh"
-        | sh
-    - name: Install dependencies
-      run: uv pip install --upgrade "flake8>=6.0"
-    - name: Lint with flake8
-      run: flake8 .
-
   mypy:
     runs-on: ubuntu-latest