Wait, what?

There were plenty of sites explaining that it was a bad idea for backups, and that it the SSH daemon doesn't actually use any extra battery when it's idle, and I agree. However, that doesn't mean that you still shouldn't be allowed to do it (defeats the true purpose of jailbreaking, right?). With that being said, you can either SSH into your device, or use a terminal app locally to run the following command, which does not remove SSH, however prevents it from running on startup.

Note: You must be root to effectively run this command

cd /Library/LaunchDaemons; mv com.openssh.sshd.plist .com.openssh.sshd.plist