Remove IsCollectionEnabled method which is unused

Bug: 851163
Change-Id: Ie02bf11865d1f84254d14723dfd55e26c1987609
Reviewed-on: https://chromium-review.googlesource.com/1256012
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595739}
1 file changed