Remove unnecessary de-duplication.
Remove unnecessary de-duplication.

Follow up on https://crrev.com/c/1113036/2/my_activity.py#752

R=aadb4a11584aa9878242ea5d9e4b7e3429654579@chromium.org

Change-Id: I56e4936f2f2bc94a734aeb510594ee8384d6e2a9
Reviewed-on: https://chromium-review.googlesource.com/1121816
Reviewed-by: Sergiy Byelozyorov <aadb4a11584aa9878242ea5d9e4b7e3429654579@chromium.org>
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools