Removed unused parts

app/models/hour.rb

@@ -47,10 +47,6 @@ class Hour < ApplicationRecord
 
   attr_reader :spv_mission_id
 
-  def spv_mission_id= id
-    self.hourable = SemesterProcessVolunteerMission.find(id).mission
-  end
-
   def assignment?
     hourable_type == 'Assignment'
   end

app/models/semester_process_volunteer_mission.rb

@@ -3,10 +3,4 @@ class SemesterProcessVolunteerMission < ApplicationRecord
 
   delegate :volunteer, to: :semester_process_volunteer
   belongs_to :semester_process_volunteer
-
-  attr_accessor :hour
-
-  def hour
-    @hour || Hour.new
-  end
 end