ci: update codecov

.github/workflows/check_linux.yml

@@ -24,7 +24,7 @@ jobs:
       run: |
         # prerequisites
         python -m pip install --upgrade pip wheel
-        python -m pip install codecov coverage flake8 pytest
+        python -m pip install coverage flake8 pytest
         # install dependencies
         pip install -e .
         pip install -r tests/requirements.txt