removing appending warning to dom

Message does not get cleared out properly as well as causing crazy view while a resize event happens.

![screenshot from 2014-05-14 14 11 22](https://cloud.githubusercontent.com/assets/578259/2977812/2f159f1e-dbb0-11e3-8f79-23d97d56783e.png)

This will just `console.warn` the message instead