I've dug a little more, and while it was possible to delete emails, you couldn't delete a whole folder at once. Looking back at comment threads from 2004, I can

I've dug a little more, and while it was possible to delete emails, you couldn't delete a whole folder at once. Looking back at comment threads from 2004, I can see a lot of people asking for a delete button and the option to delete everything in a label at once. Also, my mistake.. the "trash" folder is renamed "bin" according to your English language setting (British vs US).