GitLab

This CL removes translation strings for external drive rename notifications,
because they are no longer in use.

BUG=775018
CQ-DEPEND=CL:722140

Change-Id: Ia85cc845302f0db83e6dcad88445d2f774bb704a
Reviewed-on: https://chromium-review.googlesource.com/722460Reviewed-by: Tatsuhisa Yamaguchi <yamaguchi@chromium.org>
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Commit-Queue: Klemen Kozjek <klemenko@google.com>
Cr-Commit-Position: refs/heads/master@{#509323}