Issue
I have an environment in the system which I need to remove, how and where can I do this?
Applies To
All customers
Resolution
It is not possible to delete an environment, but you can hide them from the UI by going to Project Settings -> Environments.
If a project is hidden, you won't see that environment in the selector, unless another project with events from the same env is also selected (and doesn't have it hidden in its project settings).
More details are available on this page: https://docs.sentry.io/concepts/key-terms/environments/#hidden-environments