Normally yes, you would do that via SSH.
BUT: If you want to do something and be creative, build yourself a web interface to do that (maybe password protected^^)
I'm not that much into the whole project, but I guess it's a main aspect that files cannot be deleted easily (by normal users), as this could limit the freedom of users... but that's just my guess. I regularly look over the files, sort them somewhat, remove broken ones etc....
BUT: If you want to do something and be creative, build yourself a web interface to do that (maybe password protected^^)
I'm not that much into the whole project, but I guess it's a main aspect that files cannot be deleted easily (by normal users), as this could limit the freedom of users... but that's just my guess. I regularly look over the files, sort them somewhat, remove broken ones etc....