Removes batch_review_notification feature flag

This feature flag was being used as a gatekeeper
for the one notification for every batch review
feature.

We no longer require the feature flag since the
code is working as expected

ee/app/services/draft_notes/publish_service.rb

@@ -27,21 +27,15 @@ module DraftNotes
     def publish_draft_notes
       return if draft_notes.empty?
 
-      if Feature.enabled?(:batch_review_notification, project)
-        review = Review.create!(author: current_user, merge_request: merge_request, project: project)
+      review = Review.create!(author: current_user, merge_request: merge_request, project: project)
 
-        draft_notes.map do |draft_note|
-          draft_note.review = review
-          create_note_from_draft(draft_note)
-        end
-
-        notification_service.async.new_review(review)
-      else
-        draft_notes.each(&method(:create_note_from_draft))
+      draft_notes.map do |draft_note|
+        draft_note.review = review
+        create_note_from_draft(draft_note)
       end
-
       draft_notes.delete_all
 
+      notification_service.async.new_review(review)
       MergeRequests::ResolvedDiscussionNotificationService.new(project, current_user).execute(merge_request)
     end
 

ee/spec/services/draft_notes/publish_service_spec.rb

@@ -65,28 +65,12 @@ describe DraftNotes::PublishService do
       expect(DraftNote.count).to eq(0)
     end
 
-    context 'when batch_review_notification feature is enabled' do
-      it 'sends batch notification' do
-        expect_next_instance_of(NotificationService) do |notification_service|
-          expect(notification_service).to receive_message_chain(:async, :new_review).with(kind_of(Review))
-        end
-
-        publish
+    it 'sends batch notification' do
+      expect_next_instance_of(NotificationService) do |notification_service|
+        expect(notification_service).to receive_message_chain(:async, :new_review).with(kind_of(Review))
       end
-    end
-
-    context 'when batch_review_notification feature is disabled' do
-      it 'send a notification for each note' do
-        stub_feature_flags(batch_review_notification: false)
 
-        2.times do
-          expect_next_instance_of(NotificationService) do |notification_service|
-            expect(notification_service).to receive(:new_note).with(kind_of(Note))
-          end
-        end
-
-        publish
-      end
+      publish
     end
   end