Fix relations error in tags

app/models/i18n_variable.rb

@@ -21,8 +21,4 @@ class I18nVariable
     I18nVariable.first(:conditions => {:key => locale})[I18n.locale]
   end
   
-  def self.from_locale(locale)
-    I18nVariable.first(:conditions => {:key => locale})[I18n.locale]
-  end
-  
 end

app/models/tag.rb

@@ -4,6 +4,5 @@ class Tag
   include Mongoid::Timestamps
   
   belongs_to :module_app
-  has_and_belongs_to_many :bulletins
   
 end