Revert "mark-migrate_user_mentions-as-used" [RUN ALL RSPEC]
What does this MR do?
Reverts change done by !45162 (merged).
This is no longer needed as a better fix was done: !45179 (merged)
Does this MR meet the acceptance criteria?
Conformity
Edited by Kamil Trzciński (Back 2025-01-01)