Remove creation of poetry virtual env

.github/workflows/pypi.yml

@@ -23,24 +23,21 @@ jobs:
       - name: Install and configure Poetry
         uses: snok/install-poetry@v1
         with:
-          virtualenvs-path: ~/.virtualenvs
+          virtualenvs-create: false
           installer-parallel: true
-      - name: Cache Poetry virtualenv
-        uses: actions/cache@v2
-        id: cache
-        with:
-          path: ~/.virtualenvs
-          key: ${{ runner.os }}-py-${{ steps.setup-python.outputs.python-version }}-poetry-${{ hashFiles('poetry.lock') }}
       - name: Install version management tool
         run: |
           # same poetry env
           PIP="$(head -n1 $(which poetry) | cut -c 3-) -m pip"
           ${PIP} install poetry-dynamic-versioning
-      - name: Install dependencies
-        run: | 
-          poetry install --no-interaction --no-root --with test
-          poetry run nns get theory
-        if: steps.cache.outputs.cache-hit != 'true'
+      - name: Install dependencies 📦
+        run: poetry install --no-interaction --no-root --with test ${{ inputs.poetry-extras }}
+      - name: Install project
+        # it is required to repeat extras, otherwise they will be removed from
+        # the environment
+        run: poetry install --no-interaction ${{ inputs.poetry-extras }}
+      - name: Download the theory
+        run: poetry run nns get theory
       - name: Install task runner
         run: pip install poethepoet
       - name: Test