Remove change_type attribute from organisation name changes

app/controllers/organisation_name_changes_controller.rb

@@ -4,7 +4,6 @@ class OrganisationNameChangesController < ApplicationController
 
   def create
     @organisation_name_change = @organisation.organisation_name_changes.new(organisation_name_change_params)
-    @organisation_name_change.change_type = :user_change
 
     if @organisation_name_change.save
       notice_message = @organisation_name_change.immediate_change ? "Name change saved successfully." : "Name change scheduled for #{@organisation_name_change.formatted_startdate}."

app/models/organisation_name_change.rb

@@ -16,13 +16,6 @@ class OrganisationNameChange < ApplicationRecord
 
   before_validation :set_startdate_if_immediate
 
-  CHANGE_TYPE = {
-    user_change: 1,
-    merge: 2, # Currently not used, we could differentiate name changes resulting from a merge
-  }.freeze
-
-  enum :change_type, CHANGE_TYPE, prefix: true
-
   has_paper_trail
 
   def status

db/migrate/20250416111741_create_organisation_name_changes.rb

@@ -5,7 +5,6 @@ class CreateOrganisationNameChanges < ActiveRecord::Migration[7.0]
       t.string :name, null: false
       t.date :startdate, null: false
       t.date :discarded_at
-      t.integer :change_type
 
       t.timestamps
     end

db/schema.rb

@@ -502,7 +502,6 @@ ActiveRecord::Schema[7.2].define(version: 2025_04_16_111741) do
     t.string "name", null: false
     t.date "startdate", null: false
     t.date "discarded_at"
-    t.integer "change_type"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.index ["organisation_id", "startdate"], name: "index_org_name_changes_on_org_id_and_startdate", unique: true

spec/factories/organisation_name_change.rb

@@ -4,7 +4,6 @@ FactoryBot.define do
     name { "#{Faker::Name.name} Housing Org" }
     immediate_change { true }
     startdate { Time.zone.tomorrow }
-    change_type { :user_change }
 
     trait :future_change do
       immediate_change { false }