No action/checkout

Author: mcepl

.github/workflows/build.yml

@@ -42,7 +42,6 @@ jobs:
               xvfb-run
               xz-devel
               zlib-devel
-      - uses: actions/checkout@v4
       - run: ./configure --with-pydebug
       - run: make -j
       - run: ./python -m test -j3