Drop ndonnx for 3.9

.github/workflows/tests.yml

@@ -1,5 +1,5 @@
 name: Tests
-on: [push, pull_request]
+on: [push]
 jobs:
   tests:
     runs-on: ubuntu-latest
@@ -28,13 +28,21 @@ jobs:
           else
             PIP_EXTRA='numpy==1.26.*'
           fi
+
+          if [ "${{ matrix.python-version }}" == "3.9" ]; then
+            sed -i '/ndonnx/d' requirements-dev.txt
+          fi
           python -m pip install -r requirements-dev.txt $PIP_EXTRA
 
       - name: Run Tests
         run: |
           if [[ "${{ matrix.numpy-version }}" == "1.21" || "${{ matrix.numpy-version }}" == "dev" ]]; then
              PYTEST_EXTRA=(-k "numpy and not jax and not torch and not dask and not sparse")
           fi
+
+          if [[ "${{ matrix.python-version }}" == "3.9" ]]; then
+             PYTEST_EXTRA+=(-k "not ndonnx")
+          fi
           pytest -v "${PYTEST_EXTRA[@]}"
 
           # Make sure it installs