Remove now unused tutorial route and business logic

We can bring that back again if needed

src/routes/profile.js

@@ -3,8 +3,7 @@
 exports = module.exports = {
     get: get,
     update: update,
-    changePassword: changePassword,
-    setShowTutorial: setShowTutorial
+    changePassword: changePassword
 };
 
 var assert = require('assert'),
@@ -66,17 +65,3 @@ function changePassword(req, res, next) {
         next(new HttpSuccess(204));
     });
 }
-
-function setShowTutorial(req, res, next) {
-    assert.strictEqual(typeof req.user, 'object');
-    assert.strictEqual(typeof req.body, 'object');
-
-    if (typeof req.body.showTutorial !== 'boolean') return next(new HttpError(400, 'showTutorial must be a boolean.'));
-
-    user.setShowTutorial(req.user.id, req.body.showTutorial, function (error) {
-        if (error && error.reason === UserError.NOT_FOUND) return next(new HttpError(403, 'Wrong password'));
-        if (error) return next(new HttpError(500, error));
-
-        next(new HttpSuccess(204));
-    });
-}