disable pip cache as it expect requirements.txt file to exists

Author: ticosax

.github/workflows/test_suite.yml

@@ -21,7 +21,9 @@ jobs:
         uses: actions/[email protected]
         with:
           python-version: ${{ matrix.python-version }}
-          cache: 'pip'
+
       - run: pip install tox tox-gh-actions codecov
+
       - run: tox
+
       - run: codecov