UX: Do not delete narrative bot PM when skipping user tips (#28265)

Should fix https://meta.discourse.org/t/skip-tips-option-in-user-tip-should-not-delete-welcome-message/303420

Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>

plugins/discourse-narrative-bot/spec/user_spec.rb

@@ -111,16 +111,6 @@ RSpec.describe User do
         SiteSetting.default_other_skip_new_user_tips = true
         expect { user }.to_not change { Post.count }
       end
-
-      it "should delete the existing PM" do
-        user.user_option.skip_new_user_tips = true
-
-        expect { user.user_option.save! }.to change { Topic.count }.by(-1).and not_change {
-                UserHistory.count
-              }.and change { user.unread_high_priority_notifications }.by(-1).and change {
-                            user.notifications.count
-                          }.by(-1)
-      end
     end
 
     context "when user is anonymous?" do