Revert system hook deprecation notice
What does this MR do and why?
This MR revert the system hook deprecation notice added in !109313 (merged) as the endpoint will not be removed #381572 (comment 1376030388).
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
-
I have evaluated the MR acceptance checklist for this MR.
Related to #381572 (closed)