Remove unused delete artifact step from On Release workflow

Author: Antoine

.github/workflows/OnRelease.yml

@@ -111,11 +111,6 @@ jobs:
             body: releaseBody
           });
 
-    - name: delete artifact
-      uses: actions/delete-artifact@v5
-      with:
-        name: code-coverage-report-3.10
-
   build:
     runs-on: ubuntu-latest
     needs: test