Compile fix: Remove chrome_proximity_auth_client.cc

chrome_proximity_auth_client.cc uses easy_unlock_service which
was just moved to be ChromeOS only so chrome_proximity_auth_client.cc
needs to be as well.

If it's compiled and not completely ignored by the linker (most of
the time but not in jumbo builds), it will break the build.

TBR=jhawkins@chromium.org

Bug: 817115
Change-Id: I606cf0958beb6a736bf0717471a6542adde4dc73
Reviewed-on: https://chromium-review.googlesource.com/947962
Commit-Queue: Daniel Bratell <bratell@opera.com>
Reviewed-by: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#540751}
1 file changed