Remember token is not required.

lib/devise/models/authenticatable.rb

@@ -54,7 +54,7 @@ module Devise
       BLACKLIST_FOR_SERIALIZATION = [:encrypted_password, :reset_password_token, :reset_password_sent_at,
         :remember_created_at, :sign_in_count, :current_sign_in_at, :last_sign_in_at, :current_sign_in_ip,
         :last_sign_in_ip, :password_salt, :confirmation_token, :confirmed_at, :confirmation_sent_at,
-        :unconfirmed_email, :failed_attempts, :unlock_token, :locked_at, :authentication_token]
+        :remember_token, :unconfirmed_email, :failed_attempts, :unlock_token, :locked_at, :authentication_token]
 
       included do
         class_attribute :devise_modules, :instance_writer => false

lib/devise/models/confirmable.rb

@@ -33,15 +33,12 @@ module Devise
         before_create :generate_confirmation_token, :if => :confirmation_required?
         after_create  :send_on_create_confirmation_instructions, :if => :confirmation_required?
         before_update :postpone_email_change_until_confirmation, :if => :postpone_email_change?
-        after_update :send_confirmation_instructions, :if => :reconfirmation_required?
+        after_update  :send_confirmation_instructions, :if => :reconfirmation_required?
       end
 
       def self.required_fields(klass)
         required_methods = [:confirmation_token, :confirmed_at, :confirmation_sent_at]
-        if klass.reconfirmable
-          required_methods << :unconfirmed_email
-        end
-
+        required_methods << :unconfirmed_email if klass.reconfirmable
         required_methods
       end
 

lib/devise/models/rememberable.rb

@@ -42,7 +42,7 @@ module Devise
       attr_accessor :remember_me, :extend_remember_period
 
       def self.required_fields(klass)
-        [:remember_created_at, :remember_token]
+        [:remember_created_at]
       end
 
       # Generate a new remember token and save the record without validations
@@ -91,7 +91,7 @@ module Devise
 
     protected
 
-      def generate_remember_token?
+      def generate_remember_token? #:nodoc:
         respond_to?(:remember_token) && remember_expired?
       end
 
@@ -114,7 +114,7 @@ module Devise
         end
 
         # Generate a token checking if one does not already exist in the database.
-        def remember_token
+        def remember_token #:nodoc:
           generate_token(:remember_token)
         end