Drop JBANG_REPO

Author: gsmet

.github/workflows/sync-working-groups.yml

@@ -34,7 +34,6 @@ jobs:
         run: |
           jbang --verbose --java ${JVM_VERSION} working-groups/main.java -Dworking-groups.output=_data/wg.yaml
         env:
-          JBANG_REPO: /root/.jbang/repository
           GITHUB_TOKEN: ${{ secrets.SYNC_WORKING_GROUP_TOKEN }}
 
       - name: Configure Git author