remove mambabuild/boa: not ready for Python 3.11

Author: bnavigator

.github/conda-env/build-env.yml

@@ -1,4 +1,6 @@
 name: build-env
 dependencies:
-  - boa
-  - numpy!=1.23.0
+  - conda-build
+  - conda-verify
+  # - boa # re-enable when boa is compatible with mamba 1.0 and Python 3.11
+  - numpy !=1.23.0

.github/workflows/slycot-build-and-test.yml

@@ -168,7 +168,7 @@ jobs:
         run: |
           set -e
           numpyversion=$(python -c 'import numpy; print(numpy.version.version)')
-          conda mambabuild --python "${{ matrix.python }}" --numpy $numpyversion conda-recipe
+          conda build --python "${{ matrix.python }}" --numpy $numpyversion conda-recipe
           # preserve directory structure for custom conda channel
           find "${CONDA_PREFIX}/conda-bld" -maxdepth 2 -name 'slycot*.tar.bz2' | while read -r conda_pkg; do
             conda_platform=$(basename $(dirname "${conda_pkg}"))