Use this plugin https://github.com/thebigsmileXD/PMCMDUnregisterer If you don't want to use this method PHP: $this->getServer()->getCommandMap()->unregister("Command");
Nope, he can just change the API and everything will be fine (Not all the plugins will works with this method, but with this one it should works fine)
This is the development forum. Why spend so much trouble downloading and requiring an extra dependency plugin in the deployment procedure when you could just add a simple line of code?