Auto-marginalization discrete model parameters (#385)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: sunxd3

.github/workflows/Coverage.yml

@@ -62,9 +62,4 @@ jobs:
       - uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: true
-          
-      - uses: coverallsapp/github-action@v2
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ./lcov.info
+          fail_ci_if_error: true