Yes, by typing {{unbracket}} (and nothing else) in the Replace with: cell will remove any square brackets from the start and end of the matched text in the document.

This is useful when you want to remove square brackets around an optional or TBD provision in the document. In Find & Replace workflows, this can be used in conjunction with O&D's ability to automatically detect placeholders in the documents to do a final sweep and remove all square brackets from the documents before signing. In Merge workflows, this could be used to include optional text for some entities and delete it for other entities.