Use #any? instead of #exists? when checking media attachments (#7570)

If media_attachments are not loaded, SQL query is the same, but
the #exists? method performs SQL query even if preloaded

app/services/batched_remove_status_service.rb

@@ -81,7 +81,7 @@ class BatchedRemoveStatusService < BaseService
       redis.publish('timeline:public', payload)
       redis.publish('timeline:public:local', payload) if status.local?
 
-      if status.media_attachments.exists?
+      if status.media_attachments.any?
         redis.publish('timeline:public:media', payload)
         redis.publish('timeline:public:local:media', payload) if status.local?
       end