Remove deprecator

Author: johnnyshields

lib/devise/models/authenticatable.rb

@@ -61,9 +61,6 @@ module Authenticatable
         :last_sign_in_ip, :password_salt, :confirmation_token, :confirmed_at, :confirmation_sent_at,
         :remember_token, :unconfirmed_email, :failed_attempts, :unlock_token, :locked_at]
 
-      include Devise::DeprecatedConstantAccessor
-      deprecate_constant "BLACKLIST_FOR_SERIALIZATION", "Devise::Models::Authenticatable::UNSAFE_ATTRIBUTES_FOR_SERIALIZATION"
-
       included do
         class_attribute :devise_modules, instance_writer: false
         self.devise_modules ||= []