update woodpecker to not use requirements

.woodpecker.yml

@@ -3,7 +3,7 @@ pipeline:
     image: python:${TAG}-buster
     commands:
       - python -m pip install --upgrade pip
-      - python -m pip install -r requirements.txt
+     # - python -m pip install -r requirements.txt
       - python -m pip install pylint flake8 mypy>=0.971
       - python -m flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
   #   - mypy --strict serial_sphinx/
@@ -16,7 +16,7 @@ pipeline:
       - python -m venv venv 
       - /bin/bash -c "source venv/bin/activate"
       - python -m pip install --upgrade pip pytest
-      - python -m pip install -r requirements.txt
+     # - python -m pip install -r requirements.txt
       - python -m pip install .
       - python -m pytest