Currently in circulation.pl or moremember.pl, to delete a hold, you must select yes from dropdown fields, and then click the button.  I don't recall Koha using this behavior anywhere else.  If it does, then my mistake.

What would be preferred, in order to be more consistent with the rest of Koha, is that you have check boxes, like most other places, and the button would delete what is checked.  However, it should also include a confirmation screen or dialog.

Christopher