[ticket/13004] Remove obsolete S_HAS_ATTACHMENTS check from topic tools.

PHPBB3-13004
Merge pull request #2900 from prototech/ticket/13004

[ticket/13004] Remove obsolete S_HAS_ATTACHMENTS check from topic tools.

* prototech/ticket/13004:
  [ticket/13004] Remove obsolete S_HAS_ATTACHMENTS check from topic tools.