GitLab

Remove unused oobe_change_picture that was not cleaned up during
work that removed code that used it:
https://chromium-review.googlesource.com/c/chromium/src/+/1488018

Bug: 903577
Change-Id: Ib327d1eaa3ff1ea2c62478c726cc8be6399ceefb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1919205Reviewed-by: Roman Aleksandrov <raleksandrov@google.com>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Denis Kuznetsov [CET] <antrim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718441}