For reasons unknown to me, I get a lot of hits from searches for “readynas uninstall togglessh”. Obviously a lot of people who tried the ToggleSSH addon for their ReadyNAS found that it didn’t suit their needs and now want to uninstall it. Ok, so I’m going to tell you how to fix your problems ;)
Plain and simple: You can’t. The only purpose of ToggleSSH is – as the name suggests – to toggle the state of the SSH service on your ReadyNAS. So, to “uninstall” ToggleSSH, just “install” it again. If the SSH service was enabled on your ReadyNAS, it will be disabled afterwards and vice versa.