CI: don't add scipy dependency on Windows

.github/workflows/wheel_tests_and_release.yml

@@ -65,7 +65,7 @@ jobs:
         run: |
           PYPI_URL="https://pypi.anaconda.org/scientific-python-nightly-wheels/simple"
           CIBW_DEPS="pip install --upgrade pip build &&\
-                     pip install --pre -i $PYPI_URL cython numpy scipy &&\
+                     pip install --pre -i $PYPI_URL cython numpy &&\
                      pip install pytest meson-python ninja"
           NO_BUILD_ISOLATION="pip; args: --no-build-isolation"
           echo "CIBW_BEFORE_BUILD=$CIBW_DEPS" >> "$GITHUB_ENV"