remote remove doesn't work

```
r.remove
Git::GitExecuteError: git remote "rm" "--" "staging"  2>&1:usage: git remote rm <name>
```

If I do the following I can get it to work

``` ruby
git.lib.send(:command, 'remote', ['rm', 'staging'])
```

It seems git doesn't like the '--'

I am on git 1.7.7.3

I will try updating to the latest git and trying again.
