Now that gclient is much quieter about its output (see crbug.com/772741),
these always-emitted messages make it louder than necessary.

Change-Id: I864676c4ca57d4c060f7f58bc770d8d670695639
Reviewed-on: https://chromium-review.googlesource.com/731118Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48808}