Remove warning from db seed since it is called by db setup.

doc/development/rake_tasks.md

@@ -9,7 +9,8 @@ bundle exec rake setup
 ```
 
 The `setup` task is a alias for `gitlab:setup`.
-This tasks calls `db:setup` to create the database, with `add_limits_mysql` it adds limits to the database schema in case of a MySQL database and fianlly it runs `db:seed_fu` to seed the database.
+This tasks calls `db:setup` to create the database, calls `add_limits_mysql` that adds limits to the database schema in case of a MySQL database and fianlly it calls `db:seed_fu` to seed the database.
+Note: `db:setup` calls `db:seed` but this does nothing.
 
 ## Run tests
 

lib/tasks/seed.rake

-namespace :db do
-  desc "Seed is replaced with seed_fu"
-  task :seed => :environment do
-    raise "Please run db:seed_fu instead of db:seed."
-  end
-end