Remove deprecated? from service

Ref https://gitlab.com/gitlab-org/gitlab/-/commit/28c2c644de532d9d8666fbcf15c175ef81465688

app/helpers/services_helper.rb

@@ -52,14 +52,14 @@ module ServicesHelper
   end
 
   def service_save_button(service)
-    button_tag(class: 'btn btn-success', type: 'submit', disabled: service.deprecated?, data: { qa_selector: 'save_changes_button' }) do
+    button_tag(class: 'btn btn-success', type: 'submit', data: { qa_selector: 'save_changes_button' }) do
       icon('spinner spin', class: 'hidden js-btn-spinner') +
         content_tag(:span, 'Save changes', class: 'js-btn-label')
     end
   end
 
   def disable_fields_service?(service)
-    !current_controller?("admin/services") && service.deprecated?
+    !current_controller?('admin/services')
   end
 
   def scoped_integrations_path

app/models/service.rb

@@ -345,10 +345,6 @@ class Service < ApplicationRecord
     service
   end
 
-  def deprecated?
-    false
-  end
-
   # override if needed
   def supports_data_fields?
     false

spec/fixtures/trace/sample_trace

@@ -2768,8 +2768,6 @@ Service
       updates the has_external_issue_tracker boolean
     on update
       updates the has_external_issue_tracker boolean
-  #deprecated?
-    should return false by default
   #api_field_names
     filters out sensitive fields
 

spec/models/service_spec.rb

@@ -523,15 +523,6 @@ describe Service do
     end
   end
 
-  describe "#deprecated?" do
-    let(:project) { create(:project, :repository) }
-
-    it 'returns false by default' do
-      service = create(:service, project: project)
-      expect(service.deprecated?).to be_falsy
-    end
-  end
-
   describe '#api_field_names' do
     let(:fake_service) do
       Class.new(Service) do