cant delete the project

i found an unknown project in my GCP and firebase account
after digging I found this repo
am not the owner of the project nor I can see my email in the access list
despite all that I cant remove the project from my list in either of GCP and firebase.
I did what the instructions say in the readme with no avail.
this ghost project now lives rent free in my head, my GCP, and firebase account and it hunts me at night when am sleeping
how can I get rid of it ?
(I know this may have nothing to do with this repo, but it's the only help i can think of)