chg: dev: [cron] removed obsolete comment. !minor

cron/hooks/log_rotate-relation-joined

@@ -8,11 +8,6 @@ set -e
 
 LOGS=/var/log/cron
 
-## XXXvlab: hum it seems apache logging is run as root, so well...
-# logs_creds=$(cached_cmd_on_base_image apache "stat -c '%u %g' '$LOGS'") || {
-#     debug "Failed to query for www-data gid in ${DARKYELLOW}apache${NORMAL} base image."
-#     return 1
-# }
 
 ## XXXvlab: a lot of this intelligence should be moved away into ``logrotate`` charm
 DST="$CONFIGSTORE/$TARGET_SERVICE_NAME/etc/logrotate.d/$SERVICE_NAME"