Remove fixed pipeline notification FF

This MR removes the feature flag as it's deemed stable

app/helpers/notifications_helper.rb

@@ -120,8 +120,4 @@ module NotificationsHelper
   def can_read_project?(project)
     can?(current_user, :read_project, project)
   end
-
-  def notification_event_disabled?(event)
-    event == :fixed_pipeline && !Gitlab::Ci::Features.pipeline_fixed_notifications?
-  end
 end

app/models/ci/pipeline.rb

@@ -1084,8 +1084,6 @@ module Ci
     end
 
     def ensure_ci_ref!
-      return unless Gitlab::Ci::Features.pipeline_fixed_notifications?
-
       self.ci_ref = Ci::Ref.ensure_for(self)
     end
 

app/models/ci/ref.rb

@@ -47,8 +47,6 @@ module Ci
     end
 
     def update_status_by!(pipeline)
-      return unless Gitlab::Ci::Features.pipeline_fixed_notifications?
-
       retry_lock(self) do
         next unless last_finished_pipeline_id == pipeline.id
 

app/views/shared/notifications/_custom_notifications.html.haml

@@ -23,7 +23,6 @@
                   #{ paragraph.html_safe }
               .col-lg-8
                 - notification_setting.email_events.each_with_index do |event, index|
-                  - next if notification_event_disabled?(event)
                   - field_id = "#{notifications_menu_identifier("modal", notification_setting)}_notification_setting[#{event}]"
                   .form-group
                     .form-check{ class: ("gl-mt-0" if index == 0) }

doc/user/profile/notifications.md

@@ -187,7 +187,7 @@ To minimize the number of notifications that do not require any action, from [Gi
 | Remove milestone merge request | Subscribers, participants mentioned, and Custom notification level with this event selected |
 | New comment            | The above, plus anyone mentioned by `@username` in the comment, with notification level "Mention" or higher |
 | Failed pipeline        | The author of the pipeline |
-| Fixed pipeline    | The author of the pipeline. Enabled by default. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/24309) in GitLab 13.1. Administrators can disable this notification option using the `ci_pipeline_fixed_notifications` [feature flag](../../administration/feature_flags.md). |
+| Fixed pipeline    | The author of the pipeline. Enabled by default. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/24309) in GitLab 13.1. |
 | Successful pipeline    | The author of the pipeline, if they have the custom notification setting for successful pipelines set. If the pipeline failed previously, a `Fixed pipeline` message will be sent for the first successful pipeline after the failure, then a `Successful pipeline` message for any further successful pipelines. |
 | New epic **(ULTIMATE)** |        |
 | Close epic **(ULTIMATE)** |      |

lib/gitlab/ci/features.rb

@@ -14,10 +14,6 @@ module Gitlab
         ::Feature.enabled?(:ci_job_heartbeats_runner, project, default_enabled: true)
       end
 
-      def self.pipeline_fixed_notifications?
-        ::Feature.enabled?(:ci_pipeline_fixed_notifications, default_enabled: true)
-      end
-
       def self.instance_variables_ui_enabled?
         ::Feature.enabled?(:ci_instance_variables_ui, default_enabled: true)
       end

spec/features/projects/show/user_manages_notifications_spec.rb

@@ -67,20 +67,6 @@ RSpec.describe 'Projects > Show > User manages notifications', :js do
         end
       end
     end
-
-    context 'when ci_pipeline_fixed_notifications is disabled' do
-      before do
-        stub_feature_flags(ci_pipeline_fixed_notifications: false)
-      end
-
-      it 'hides fixed_pipeline checkbox' do
-        visit project_path(project)
-        click_notifications_button
-        page.find('a[data-notification-level="custom"]').click
-
-        expect(page).not_to have_selector("input[name='notification_setting[fixed_pipeline]']")
-      end
-    end
   end
 
   context 'when project emails are disabled' do

spec/models/ci/pipeline_spec.rb

@@ -2918,25 +2918,9 @@ RSpec.describe Ci::Pipeline, :mailer do
   describe '#ensure_ci_ref!' do
     subject { pipeline.ensure_ci_ref! }
 
-    shared_examples_for 'protected by feature flag' do
-      context 'when feature flag is disabled' do
-        before do
-          stub_feature_flags(ci_pipeline_fixed_notifications: false)
-        end
-
-        it 'does not do anything' do
-          expect(Ci::Ref).not_to receive(:ensure_for)
-
-          subject
-        end
-      end
-    end
-
     context 'when ci_ref does not exist yet' do
       let!(:pipeline) { create(:ci_pipeline, ci_ref_presence: false) }
 
-      it_behaves_like 'protected by feature flag'
-
       it 'creates a new ci_ref and assigns it' do
         expect { subject }.to change { Ci::Ref.count }.by(1)
 
@@ -2947,8 +2931,6 @@ RSpec.describe Ci::Pipeline, :mailer do
     context 'when ci_ref already exists' do
       let!(:pipeline) { create(:ci_pipeline) }
 
-      it_behaves_like 'protected by feature flag'
-
       it 'fetches a new ci_ref and assigns it' do
         expect { subject }.not_to change { Ci::Ref.count }
 

spec/models/ci/ref_spec.rb

@@ -161,16 +161,6 @@ RSpec.describe Ci::Ref do
       it_behaves_like 'no-op'
     end
 
-    context 'when feature flag is disabled' do
-      let(:pipeline) { create(:ci_pipeline, :success, ci_ref: ci_ref) }
-
-      before do
-        stub_feature_flags(ci_pipeline_fixed_notifications: false)
-      end
-
-      it_behaves_like 'no-op'
-    end
-
     context 'when pipeline is not the latest pipeline' do
       let!(:pipeline) { create(:ci_pipeline, :success, ci_ref: ci_ref) }
       let!(:latest_pipeline) { create(:ci_pipeline, :success, ci_ref: ci_ref) }