ci: Remove instruction to delete cache

Author: pawamoy

.gitlab-ci.yml

@@ -46,7 +46,6 @@ check-safety:
     - apt-get install -y python-enchant
     - pip install poetry
     - poetry config settings.virtualenvs.in-project true
-    - rm -rf .venv
     - poetry install -vv
     - poetry --version
   script: make check-safety