chore: remove checkout from upload to codecov (#469)

Signed-off-by: Charles-Edouard Brétéché <[email protected]>

.github/workflows/tests.yaml

@@ -41,8 +41,6 @@ jobs:
     - unit-tests
     runs-on: ubuntu-latest
     steps:
-    - name: Checkout
-      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
     - name: Download coverage
       uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
       with: