Remove set_user_availability_status feature flag
We already enabled the set_user_availability_status feature flag by in !51668 (merged).
Let's remove the feature flag completely from our codebase and add a changelog entry
The 17.0 major release is coming on May 16, 2024! This version brings many exciting improvements to GitLab, but also removes some deprecated features. We are introducing three breaking change windows during which we expect breaking changes to be deployed to GitLab.com. You can read more about it on our blogpost. The second breaking change window begins 2024-04-29 09:00 UTC and ends 2024-05-01 22:00 UTC.
We already enabled the set_user_availability_status feature flag by in !51668 (merged).
Let's remove the feature flag completely from our codebase and add a changelog entry