searchable: don't automatically include id, created_at, updated_at.

Don't make search methods on models call super in order to search
certain default attributes (id, created_at, updated_at). Simplifies some
magic.

app/models/user_feedback.rb

@@ -30,9 +30,7 @@ class UserFeedback < ApplicationRecord
     end
 
     def search(params)
-      q = super
-
-      q = q.search_attributes(params, :category, :body, :is_deleted)
+      q = search_attributes(params, :id, :created_at, :updated_at, :category, :body, :is_deleted)
       q = q.text_attribute_matches(:body, params[:body_matches])
 
       q.apply_default_order(params)