remove unnecessary methods

models/content.rb

@@ -84,15 +84,4 @@ class Content
     answer
   end
 
-  def self.by_date_range from_when, to_when
-     #return all content between from_when and to_when
-     Content.where(:created_at.gte => (from_when)).where(:created_at.lte => (to_when))
-  end
-
-  def self.by_date_range_and_thread_ids from_when, to_when, thread_ids
-     #return all content between from_when and to_when
-     Content.where(:created_at.gte => (from_when)).where(:created_at.lte => (to_when)).
-       where(:comment_thread_id.in => thread_ids)
-  end
-
 end