I understood what he meant here. He’s saying that currently, to delete images, we have to remove them one by one, and each deletion still requires an individual confirmation. I actually think the confirmation step is good, as it helps prevent accidentally deleting something important.
What might be missing, though, is the option to select multiple images at once and then issue a single delete command. That would make things much easier.
Another point — which I haven’t been able to do or reproduce here — is having the ability to use something like a CTRL+Z (like in Photoshop) or a small “Undo” button to reverse the last action. That would also be a great addition.