Remove python 3.8 support

.github/workflows/build-publish.yml

@@ -23,16 +23,6 @@ jobs:
         pip install poetry twine
     - name: Copy schema files from upstream
       run: ./copy-schema-files.sh
-    - name: Build manylinux Python 3.8 wheels
-      uses: RalfG/[email protected]
-      with:
-        pre-build-command: 'sh pre-build.sh'
-        python-versions: 'cp38-cp38'
-        build-requirements: 'poetry-core setuptools capnpy'
-        pip-wheel-args: '-w ./dist --no-deps --no-build-isolation'
-        system-packages: 'capnproto'
-    - name: Remove obsolete wheels
-      run: sudo rm dist/*manylinux_2_17_x86_64.whl
     - name: Build manylinux Python 3.9 wheels
       uses: RalfG/[email protected]
       with: