GitLab

This CL removes unused header, device_id_helper.h, from
ios_chrome_signin_client.mm.

Bug: 927332
Change-Id: I34c9fd2254e1b4170f1030d54517d452cb414f6d
Reviewed-on: https://chromium-review.googlesource.com/c/1448008Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Julie Jeongeun Kim <jkim@igalia.com>
Cr-Commit-Position: refs/heads/master@{#628497}