ci: Abandon variables

Author: Alan Christie

.github/workflows/build.yaml

@@ -20,10 +20,6 @@ name: build
 on:
   push:
 
-env:
-  POETRY_VERSION: '1.8.5'
-  PYTHON_VERSION: '3.12'
-
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -39,11 +35,10 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: env.PYTHON_VERSION
+        python-version: '3.12'
     - name: Run pre-commit (all files)
       run: |
-        pip install --no-cache-dir poetry==env.POETRY_VERSION
-        poetry install --no-root --no-directory --with docs
+        pip install --no-cache-dir poetry=='1.8.5'
         poetry run pre-commit run --all-files
     - name: Docker build
       uses: docker/build-push-action@v6