test: Remove extra dependency commands.

.github/workflows/python-package.yml

@@ -27,8 +27,7 @@ jobs:
  - name: Install dependencies
  run: |
  python -m pip install --upgrade pip
- python -m pip install ruff pytest
- python -m pip install ".[testing]"
+ python -m pip install ".[dev]"
  if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
  - name: Lint with Ruff
  run: |