Sorry if this messes up your order or something, but I've cleaned out both the Hikawa Ayame Gallery and the Matsuda Shiori Gallery, both graduates. moomookan pointed out to me that the threads hadn't been moved from the NMB48 galleries, and while moving them I noticed a lot of dead links so I just cleaned them. This includes the dead links and yfrog links that were still displaying thumbnails but could no longer be accessed due to the account being suspended. So you can skip these 2, at least I'm not sure how you want to put this in your OP, so I'll leave you to do that.
I cleaned up Ono Haruka's gallery too: viewtopic.php?f=36&t=1288. Someone brought it up to me that her gallery had never been moved to the Graduated Gallery, so while I was moving it I deleted all the dead links too.