How do I delete a project from Unity Services?
http://forum.unity3d.com/threads/removing-projects-from-unity-cloud-build.354510/ shows a screenshot that don’t exist anymore (via the cloud build setup).
Unity ID only lets me transfer or rename projects.
Hello @Immanuel-Scholz ,
YES, now you can remove the project from active storage. !
This may take a little while to fully take effect 
https://forum.unity3d.com/threads/delete-project-from-collab.425420/
@ Immanuel Scholz
You can’t.
I got this on a reply from a service request when I asked the same thing just the other day.
“Unfortunately, game projects cannot be deleted at this time due to limitations in our UDN integration, but this should be available in the new future as well.”
“Archive” a project is not “Delete” a project. It is still in storage. You can unarchive any of your projects after you archive it.
I found a way to do it, I created a new organization with a random name.
Then I transfered all the projects I wanted to delete to that new organization and archive them all.
After that I just deleted that new organization with all the projects inside and that’s it.
Now that Unity has changed its projects website interface, anyone knows the latest method to delete a project. I can’t find that option now.
after trying to delete old projects (with a dummy organization from @DarkSaulo’s idea).
here is my step.
Create a dummy organization like “Deleting Organization”.
using the following link Unity ID
Transfer all projects you want to delete to the dummy organization.
Archived all projects in that dummy organization (Otherwise it will not allow you to delete the dummy organization).
Delete dummy organization.
PS: After that, I returned to my original organization, found the repositories, and deleted them from the project once more.
Go to Projects → View → Settings tab → Archive project.
I could delete one of my projects If I to documents in the file explorer, you may be able to see the name of your project on a unzipped file. If you delete that, it is also deleted from unity, But if you saved the file somewhere else try deleting it there.
Hope this was helpful!
Same her can any one solved this in 2021
it’s 2024 and the issue is still there.
Thanks to idea from @DarkSaulo (create a dummy organization) in this topic, I managed to delete my old unused projects. But you have to do it very gently (meaning slowly) since Unity will stop you with error message that you are sending to much requests.
