It would be nice to have a tool to batch delete biblio records that did not depend on items. So you choose to match on the biblionumber, 001 or the 035, load a csv or text file in (or paste a list of numbers) and it lets you delete. It should ask if you want to delete bib records with items attached before it runs.
We do have a command line script and a GUI tool to delete by biblionumber. Having one for 001 would still be very nice.