remove email notification for admin and moderation actions

app/models/admin/account_action.rb

@@ -28,7 +28,6 @@ class Admin::AccountAction
       process_warning!
     end
 
-    queue_email!
     process_reports!
   end
 
@@ -118,12 +117,6 @@ class Admin::AccountAction
     Admin::SuspensionWorker.perform_async(target_account.id)
   end
 
-  def queue_email!
-    return unless warnable?
-
-    UserMailer.warning(target_account.user, warning).deliver_later!
-  end
-
   def warnable?
     send_email_notification && target_account.local?
   end