Revert "Migrate ActiveRecord::Normalization to Active Model"

Author: rafaelfranca

activemodel/CHANGELOG.md

@@ -1,20 +1,2 @@
-*   Backport `ActiveRecord::Normalization` to `ActiveModel::Attributes::Normalization`
-
-    ```ruby
-    class User
-      include ActiveModel::Attributes
-      include ActiveModel::Attributes::Normalization
-
-      attribute :email, :string
-
-      normalizes :email, with: -> email { email.strip.downcase }
-    end
-
-    user = User.new
-    user.email =    " [email protected]\n"
-    user.email # => "[email protected]"
-    ```
-
-    *Sean Doyle*
 
 Please check [8-0-stable](https://github.com/rails/rails/blob/8-0-stable/activemodel/CHANGELOG.md) for previous changes.

activemodel/lib/active_model.rb

@@ -56,12 +56,6 @@ module ActiveModel
   autoload :Validations
   autoload :Validator
 
-  module Attributes
-    extend ActiveSupport::Autoload
-
-    autoload :Normalization
-  end
-
   eager_autoload do
     autoload :Errors
     autoload :Error