gtm: compile out service management code

It is no longer needed for Chrome builds.

Bug: 903800
Change-Id: I3dbe2fc9106f89e3ca1c147721cbe86c5cbd8563
Reviewed-on: https://chromium-review.googlesource.com/c/1404706
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621608}
1 file changed