close #2080 fix bug taxon reposition not work

app/models/spree_cm_commissioner/taxon_decorator.rb

@@ -25,18 +25,9 @@ def self.prepended(base)
 
       base.has_one :web_banner, as: :viewable, dependent: :destroy, class_name: 'SpreeCmCommissioner::TaxonWebBanner'
       base.has_one :app_banner, as: :viewable, dependent: :destroy, class_name: 'SpreeCmCommissioner::TaxonAppBanner'
-      base.has_one :home_banner, as: :viewable, dependent: :destroy, class_name: 'SpreeCmCommissioner::TaxonHomeBanner'
 
-      base.has_many :children, class_name: 'Spree::Taxon', foreign_key: :parent_id, dependent: :destroy
-      base.has_many :children_classifications, through: :children, source: :classifications, class_name: 'Spree::Classification'
+      base.acts_as_list scope: :parent_id
 
-      base.has_many :notification_taxons, class_name: 'SpreeCmCommissioner::NotificationTaxon'
-      base.has_many :customer_notifications, through: :notification_taxons, class_name: 'SpreeCmCommissioner::CustomerNotification'
-
-      base.has_many :visible_classifications, -> { where(visible: true).order(:position) }, class_name: 'Spree::Classification'
-      base.has_many :visible_products, through: :visible_classifications, class_name: 'Spree::Product', source: :product
-
-      base.validates_associated :category_icon
       base.before_save :set_kind
       base.before_save :set_slug
 
@@ -53,6 +44,8 @@ def foreground_color
       preferred_foreground_color
     end
 
+    private
+
     def set_kind
       self.kind = taxonomy.kind
     end