The limit on sending photos for verification has been blocked for more than a week.

On the in review tab, scroll down (reduce the size of your browser window if necessary) and you will see a "delete" link. Select the files you want to delete. It's recommended you copy, paste and save your titles and keywords to a note pad or something so that re-submission is a less painful process.

How can I do this?

After 3 or 4 months, we suggest deleting stuck assets and resubmitting them with new file names, so that they are treated as new. In my experience, if the file name isn't changed, they end up right back at the bottom of the pile.