Well, one way to do this would be to exclude the entire pool from assignment. This would leave the configuration of the pool in there and you would just remove the exclusion if you wanted it to assign addresses again.
ip dhcp excluded-address <first address> <last address>
However, I would just archive a copy of the config and remove the pool.
Best Answer
Depending on which version of 12.x you're on, you should be able to do the following:
This stops the router from listening on port 5060.