How can I stop com.apple.launched from attempting to start a service we uninstalled?
If you want to use a software, you can try Lingon.

It allows you to manage (create, edit, delete) all the launchd items on your system.

Otherwise, if you want to go by hand, look inside the following folders :


/Library/LaunchAgents
/Library/LaunchDaemons
~/Library/LaunchAgents