Turn off generating geowiki limn files

We're rebooting geowiki's data repo. Until the geowiki scripts are
updated to export only needed data, we avoid pushing to the data repo
and therefore turn the corresponding geowiki limn cronjob off.

We do not touch the geowiki cronjob that collects data.

Change-Id: I1a1bd49a35be955e8a12e0d0f946f81915d2c48c