Originally Posted by IDZRVIT

I believe all Canadian models come with the block heater.

The cord is unobtrusive so why would you want to go through the trouble to remove it? On my '09 Z I didn't even know it was there until someone said it came with a block heater.
It may be attached to a freeze plug which is pressed into the block. Then it would be a pita to get it out.

If using synthetic oil, a block heater becomes less useful as the oil won't be as thick at colder temperatures as dino oil would be. But getting down to -40 it would have its benefits especially at reducing cold start wear with little lubrication.