How to stop consolekit logging

[Colin Law]

I am running Ubuntu on a Sheeva Plug PC on an SD card so I want to
minimise the amount of logging.  I have been unable to find any way of
stopping consolekit from logging to /var/log/ConsoleKit/history or at
least reducing the detail.  It gets written to every few minutes and
grows at about 0.5MB/day.  Google has failed me and the consolekit
documentation that I found said nothing about logging.

Any ideas anyone?

Colin