delete unused methods

app/models/city_job.rb

@@ -22,12 +22,4 @@
 class CityJob < ApplicationRecord
 class CityJob < ApplicationRecord
   belongs_to :city
   belongs_to :city
   belongs_to :job
   belongs_to :job
-
-  def city_id
-    self.city.id
-  end
-
-  def job_id
-    self.job.id
-  end
 end
 end