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As aggreed we are going to reduce the translation set for policy
documentation to the 12 primary marketing languages and the five next
top ones.

BUG=984053
TEST=The policy_templates target builds.

Change-Id: I72acf55803ae6a7f192d63d8a8291c32f46a8a4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1705920
Commit-Queue: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Michael Moss <mmoss@chromium.org>
Reviewed-by: Krishna Govind <govind@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678423}