Move LanguageSelector to views

It's too simple to be called a structure.

src/components/views/auth/AuthHeader.js

@@ -25,7 +25,7 @@ module.exports = React.createClass({
 
     render: function() {
         const AuthHeaderLogo = sdk.getComponent('auth.AuthHeaderLogo');
-        const LanguageSelector = sdk.getComponent('structures.auth.LanguageSelector');
+        const LanguageSelector = sdk.getComponent('views.auth.LanguageSelector');
 
         return (
             <div className="mx_AuthHeader">