This feature is in no way related to the stated purpose of this pull request: "App only auth requests". It does not belong in this pull request.

My reason for reverting this particular change is *not* that I haven't found a personal use-case for this resource. The issue is that every proposed use-case for this resource turns out to be a bad practice, to be avoided. As an example, [see this mailing list discussion](https://groups.google.com/d/msg/twitter-ruby-gem/czJEbEQD36Q/Y0yoTk9JngwJ). Every proposal I've entertained is better addressed by rescuing `Twitter::Error::TooManyRequests`. If you'd like to propose a legitimate use-case for this "feature", please do so in a separate pull request.

Furthermore, the particular implementation you've proposed exposes Twitter API internals, which this library aims to abstract. If you'd like to access this resource as-in, you're welcome to use the following application code:

```ruby
Twitter.get('/1.1/application/rate_limit_status.json')[:body]
```