Bloompub export - remove cover and credit page etc

We are using Bloom to export Active Presenter widgets to bloompub and then importing the book into Reading App Builder. Is there a way to remove unnecessary pages such as cover pages, credits, title page… ? I tried removing them in the htm file of the Bloom book but they get added again before I can do the bloompub export. Or is there a way to edit the bloompub?

Or is there a way to edit the bloompub?

Though it fills me and the other devs with anxiety that someone might be editing them, yes, BloomPubs are zip files so technically, they can be hacked by hand.