This is so seriously lame. I have photos I want to delete off my phone and for one, having to click every single one and also click delete and then click to confirm you MUST be joking. Google needs to get it together. (so you can delete some??? lol) Cuz I don't see one a friend sent me so I can only delete the images I send? This is so annoying. Going to start looking for another text app cuz I'm truly over google now. And the fact that you cant delete anything within hangouts is absurd. I feel your pain guys, I really do.
So yeah, looks like you can delete "some" images from the google album archive but even that is super fking lame. :/