Remove User#private_token

app/models/user.rb

@@ -22,7 +22,6 @@ class User < ActiveRecord::Base
   ignore_column :external_email
   ignore_column :email_provider
 
-  add_authentication_token_field :authentication_token
   add_authentication_token_field :incoming_email_token
   add_authentication_token_field :rss_token
 
@@ -163,7 +162,7 @@ class User < ActiveRecord::Base
   before_validation :sanitize_attrs
   before_validation :set_notification_email, if: :email_changed?
   before_validation :set_public_email, if: :public_email_changed?
-  before_save :ensure_authentication_token, :ensure_incoming_email_token
+  before_save :ensure_incoming_email_token
   before_save :ensure_user_rights_and_limits, if: :external_changed?
   before_save :skip_reconfirmation!, if: ->(user) { user.email_changed? && user.read_only_attribute?(:email) }
   before_save :check_for_verified_email, if: ->(user) { user.email_changed? && !user.new_record? }
@@ -185,8 +184,6 @@ class User < ActiveRecord::Base
   # Note: When adding an option, it MUST go on the end of the array.
   enum project_view: [:readme, :activity, :files]
 
-  alias_attribute :private_token, :authentication_token
-
   delegate :path, to: :namespace, allow_nil: true, prefix: true
 
   state_machine :state, initial: :active do