Remove ensure from with_transaction_returning_status

The test added in 12b0b26df7560ab5199ba830586864085441508f passes even
without this code since 9b8c7796a9c2048208aa843ad3dc477dffa8bdee, as the
call to `id` in `remember_transaction_record_state` now triggers a
`sync_with_transaction_state` which discards the leftover state from the
previous transaction.

This issue had already been fixed for `save!`, `destroy` and `touch` in
caae79a385ce112245262a17414bcd96bea013c2, but continued to affect `save`
because the call to `rollback_active_record_state!` in that method would
increment the transaction level before `add_to_transaction` could clear
it, preventing the fix from working correctly.

As `rollback_active_record_state!` was removed entirely in
48007d5390db47fc1223f57c8e7ab3ebb7c3a3d7, this code is no longer needed.

0 files changed, 0 insertions, 0 deletions