Remove deprecated config warning.
Remove deprecated config warning.

This will not work in 0.2.x, and was already slated to be removed...

kimroen/ember-cli-coffeescript,kimroen/ember-cli-coffeescript,flcdrg/ember-cli-typescript,bianjp/ember-cli-coffeescript,flcdrg/ember-cli-typescript,kimroen/ember-cli-coffeescript,philipbjorge/ember-cli-typescript-compiler,philipbjorge/ember-cli-typescript-compiler,philipbjorge/ember-cli-typescript-compiler