The example here is in an estimate, but this process can be followed in any list in Buildxact where there are bulk items to be deleted.
Step by step instructions:
Currently you click the delete button
A message appears asking you to confirm that you want to delete the item, this happens for each item individually.
3. A work around is to open up the category with the edit pencil, this puts the section into "edit" mode, which eliminates the "Delete item?" pop up from appearing when you click the delete button and can speed up the process.