1 files changed, 1 insertions, 8 deletions
diff --git a/activerecord/test/models/topic.rb b/activerecord/test/models/topic.rb
index fdb461ed7f..77101090f2 100644
--- a/activerecord/test/models/topic.rb
+++ b/activerecord/test/models/topic.rb
@@ -10,9 +10,6 @@ class Topic < ActiveRecord::Base
   scope :approved, -> { where(approved: true) }
   scope :rejected, -> { where(approved: false) }
 
-  scope :children, -> { where.not(parent_id: nil) }
-  scope :has_children, -> { where(id: Topic.children.select(:parent_id)) }
-
   scope :scope_with_lambda, lambda { all }
 
   scope :by_lifo, -> { where(author_name: "lifo") }
@@ -102,7 +99,7 @@ class Topic < ActiveRecord::Base
     end
 
     def destroy_children
-      self.class.where("parent_id = #{id}").delete_all
+      self.class.delete_by(parent_id: id)
     end
 
     def set_email_address
@@ -122,10 +119,6 @@ class Topic < ActiveRecord::Base
     end
 end
 
-class ImportantTopic < Topic
-  serialize :important, Hash
-end
-
 class DefaultRejectedTopic < Topic
   default_scope -> { where(approved: false) }
 end