Wire transfers that are currently in the saved or file not originated statuses will remain in their given status indefinitely. To fully delete the transfer, you can follow these steps:
Login to your Business Online Banking and select "Payments & Transfers"
Select "Delete Wire Transfer" (fifth option down on the left)
You can then click on the transaction description (indicated as blue hyperlink on the left) to pull up the wire transfer.
The transfer will then be deleted.