Disable oauth2/token from WPCOM

[cowglow]

Summary

I'm using the plugin with a WPCOM site and I always see the error:

Path: /oauth2/token
The server response was "400 Bad Request"

This feature request aims at implementing a way to remove the query for an oauth token

Basic example

...
auth: {
   oauth: false // boolean
}

Motivation

This should remove unnecessary error messages..