GitLab

Supervised Users are deprecated, and creation has been disabled for a
while. Time to get rid of the code.

Bug: 828890
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ib95d138a5bdfa8fa150c99c1f85b8d2688ee3a27
Reviewed-on: https://chromium-review.googlesource.com/1029952Reviewed-by: Mihai Sardarescu <msarda@chromium.org>
Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556766}