DEV: skip topic deletion staff log when user skip new user tips.

Previously, every time when a user skipped the "new user tips" it will add a staff action log since the discobot's welcome post is destroyed.

plugins/discourse-narrative-bot/config/locales/server.en.yml

@@ -154,7 +154,6 @@ en:
       reset_trigger: "tutorial"
       title: "New user tutorial completion certificate"
       cert_title: "In recognition of successful completion of the new user tutorial"
-      delete_reason: "User skipped the new user tips"
 
       hello:
         title: "Greetings!"

plugins/discourse-narrative-bot/plugin.rb

@@ -194,7 +194,7 @@ after_initialize do
     return if topic.blank?
 
     first_post = topic.ordered_posts.first
-    PostDestroyer.new(Discourse.system_user, first_post, context: I18n.t('discourse_narrative_bot.new_user_narrative.delete_reason')).destroy
+    PostDestroyer.new(Discourse.system_user, first_post, skip_staff_log: true).destroy
     DiscourseNarrativeBot::Store.remove(self.id)
   end
 

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

@@ -119,7 +119,10 @@ describe User do
       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)
+        expect {
+          user.user_option.save!
+        }.to change { Topic.count }.by(-1)
+          .and change { UserHistory.count }.by(0)
       end
     end