core&ui: goodbye, minio (#417)

install/docker/backend/entrypoint.sh

@@ -12,7 +12,6 @@ fi
 
 if [ ! -f "$ROOT/first" ]; then
     echo "for marking use only!" > "$ROOT/first"
-    hydrooj cli system set file.endPoint http://oj-minio:9000/
 
     hydrooj cli user create systemjudge@systemjudge.local root rootroot
     hydrooj cli user setSuperAdmin 2