Remove deprecated demographics birth year offset pref.
This change removes the `sync.demographics_birth_year_offset` pref and
the associated migration logic from profile prefs to local state. The
cleanup was scheduled for after September 2023.
Since the pref was never cleared, adds logic to clear the pref and
sets the next step to 12 months later for removing the pref itself.
Bug: 40240008
Change-Id: I9a0a0b75f4c64f070d96a6be36f6a17ad93b2acb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7243638
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Auto-Submit: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1557413}
NOKEYCHECK=True
GitOrigin-RevId: 35246bb42d92a7648958c2fb078c86839d58e21c
2 files changed
