Remove outdated deprecation warning
What does this MR do and why?
Add some missing deprecation information and remove the INCREMENTAL_ROLLOUT_MODE
variable.
This variable was deprecated some time ago, and I can't find the original issue/MR. However, it was never
removed, and a comment in the CI/CD template indicate that it was left in for backwards compatibility.
Removes an outdated deprecation warning.
Edited by Phillip Wells