rails 3-2-stable remove_column in migrations

output:

THE SCHEMA CHANGES FROM:

ActiveRecord::Schema.define(:version => 0) do

  create_table "my_table", :primary_key => "my_table_id", :force => true do |t|
    t.integer "col_one"
    t.string  "col_two", :limit => 128, :null => false
  end

end

TO:

ActiveRecord::Schema.define(:version => 0) do

  create_table "my_table", :id => false, :force => true do |t|
    t.integer "my_table_id"
    t.integer "col_one"
  end

end

script.rb

require 'active_record'
ActiveRecord::Base.establish_connection :adapter => 'sqlite3', :database => ':memory:'
ActiveRecord::Schema.define do
create_table "my_table", :primary_key => "my_table_id", :force => true do |t|
  t.integer  "col_one"
  t.string   "col_two",         :limit => 128, :null => false
end
end

ActiveRecord::SchemaDumper.dump

ActiveRecord::Schema.define(version: 0) do

  create_table "my_table", primary_key: "my_table_id", force: true do |t|
    t.integer "col_one"
    t.string  "col_two", limit: 128, null: false
  end

end

class RemoveColTwoFromMyTable < ActiveRecord::Migration
  def up
    remove_column :my_table, "col_two"
  end
end
RemoveColTwoFromMyTable.migrate :up
ActiveRecord::SchemaDumper.dump