Remote.delete returns -3

Trying to remove a remote from my repo, but it returns -3. I am unable to find any error code meanings.
What does -3 means?

```
var result = git.Remote.delete(repo, "origin");
console.log(result);
```

I'm trying to do the same as this command will do:

```
git remote rm origin
```

I hope I'm using the correct method! :)

/ Jens
