Option to remove empty pages?

[YbCl3]

Depending on the settings cropping an empty page doesn't always really make much sense, resulting in things like tiny square pages, or even errors that leave the page uncropped because it would have 0 size.

I don't know enough about how PDFs work to know if this would be a sensible thing to add, or if it would be too different from/outside the scope of the normal cropping this tool does, but it seems to me like it would be useful to have the option to completely remove the empty pages when cropping.