You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 040_cleanup.rb
    path of file: ./repos/moebooru/db/migrate
    
    the code of the file until where you have to start completion: class Cleanup < ActiveRecord::Migration[5.1]
  def self.up

    
  def self.up
    remove_column :forum_posts, :reply_count
    remove_column :users, :user_blacklist
    remove_column :users, :post_threshold
    drop_table :invites
    drop_table :news_updates
  end