ci: classy no longer requires old cython?

.github/workflows/tests.yml

@@ -76,17 +76,11 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
-    - name: Install dependencies
-      run: |
-        python -m pip install -U pip
-        pip install numpy
-        pip install 'setuptools' 'wheel' 'numpy>=1.19.0' 'Cython>=0.29.21,<3'  # for classy
-        pip install --no-build-isolation classy
-
     - name: Install package from source
       if: ${{ env.PUBLISH != 'true' }}
       run: |
-        pip install -U .[test]
+        pip install -U pip
+        pip install -vU .[test]
         make -C pipe_asdf
 
     - name: Fetch wheel

.pre-commit-config.yaml

@@ -18,7 +18,7 @@ repos:
       - id: ruff
         # TODO: turning off line length check
         # When ruff formatting is available, use that to auto-fix
-        args: [--fix, --exit-non-zero-on-fix, --ignore=E501]
+        args: [--fix, --ignore=E501]
       - id: ruff-format
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.6.0