Revert "FIX: Delete related search data when record has been deleted."

This reverts commit ecc799ab56.

This commit does not fix anything because we've always been deleting
records in `Searchable`.

app/models/category.rb

@@ -47,8 +47,6 @@ class Category < ActiveRecord::Base
 
   has_and_belongs_to_many :web_hooks
 
-  has_one :category_search_data, dependent: :delete
-
   validates :user_id, presence: true
 
   validates :name, if: Proc.new { |c| c.new_record? || c.will_save_change_to_name? },

app/models/post.rb

@@ -52,7 +52,6 @@ class Post < ActiveRecord::Base
   has_many :revisions, -> { order(:number) }, foreign_key: :post_id, class_name: 'PostRevision'
 
   has_many :user_actions, foreign_key: :target_post_id
-  has_one :post_search_data, dependent: :delete
 
   belongs_to :image_upload, class_name: "Upload"
 

app/models/tag.rb

@@ -39,8 +39,6 @@ class Tag < ActiveRecord::Base
   belongs_to :target_tag, class_name: "Tag", optional: true
   has_many :synonyms, class_name: "Tag", foreign_key: "target_tag_id", dependent: :destroy
 
-  has_one :tag_search_data, dependent: :delete
-
   after_save :index_search
   after_save :update_synonym_associations
 

app/models/topic.rb

@@ -233,7 +233,7 @@ class Topic < ActiveRecord::Base
 
   has_one :user_warning
   has_one :first_post, -> { where post_number: 1 }, class_name: 'Post'
-  has_one :topic_search_data, dependent: :delete
+  has_one :topic_search_data
   has_one :topic_embed, dependent: :destroy
 
   belongs_to :image_upload, class_name: 'Upload'

app/models/user.rb

@@ -48,7 +48,6 @@ class User < ActiveRecord::Base
   has_one :anonymous_user_master, class_name: 'AnonymousUser', dependent: :destroy
   has_one :anonymous_user_shadow, ->(record) { where(active: true) }, foreign_key: :master_user_id, class_name: 'AnonymousUser', dependent: :destroy
   has_one :invited_user, dependent: :destroy
-  has_one :user_search_data, dependent: :delete
 
   # delete all is faster but bypasses callbacks
   has_many :bookmarks, dependent: :delete_all