FIX: post removal message is in portuguese

Meta: [Post Removal Notices (Not|Too) Localised](http://meta.discourse.org/t/post-removal-notices-not-too-localised/4865)

Some locales files were overwriting the en locale.

I've been thinking about adding a test that would check that the name of every files in the `config/locales` folder actually matches the locale they are defining. Would that be helpful or just a waste of time?