Add corresponding code to help pass test

app/controllers/custom_wizard/admin/wizard.rb

@@ -26,6 +26,8 @@ class CustomWizard::AdminWizardController < CustomWizard::AdminController
 
   def remove
     if CustomWizard::Template.remove(@wizard.id)
+      related_custom_fields = CategoryCustomField.where(name: 'create_topic_wizard', value: @wizard.name)
+      related_custom_fields.destroy_all
       render json: success_json
     else
       render json: failed_json

spec/requests/custom_wizard/admin/wizard_controller_spec.rb

@@ -5,7 +5,7 @@ describe CustomWizard::AdminWizardController do
   fab!(:user1) { Fabricate(:user) }
   fab!(:user2) { Fabricate(:user) }
   let(:template) { get_wizard_fixture("wizard") }
-  let(:category) { Fabricate(:category, custom_fields: { create_topic_wizard: "wizard" }) }
+  let(:category) { Fabricate(:category, custom_fields: { create_topic_wizard: template['name'] }) }
 
   before do
     CustomWizard::Template.save(template, skip_jobs: true)
@@ -40,12 +40,12 @@ describe CustomWizard::AdminWizardController do
     expect(response.parsed_body['steps'].length).to eq(3)
   end
 
-  it "removes wizard templates" do
-    expect(CategoryCustomField.find_by(category_id: category.id, name: 'create_topic_wizard')).not_to eq(nil)
+  it "removes wizard templates and make sure create_topic_wizard settings for that wizard are removed from Categories" do
+    expect(CategoryCustomField.find_by(category_id: category.id, name: 'create_topic_wizard', value: template['name'])).not_to eq(nil)
     delete "/admin/wizards/wizard/#{template['id']}.json"
     expect(response.status).to eq(200)
     expect(CustomWizard::Template.exists?(template['id'])).to eq(false)
-    expect(CategoryCustomField.find_by(category_id: category.id, name: 'create_topic_wizard')).to eq(nil)
+    expect(CategoryCustomField.find_by(name: 'create_topic_wizard', value: template['name'])).to eq(nil)
   end
 
   it "saves wizard templates" do