GitLab

This test class isn't being used and ServiceDirectoryClient is being
deprecated, so remove this class.

Test: Tests throughout code base still pass.

Bug: 974072
Change-Id: Ie6dc43bfb9f1cfb69bab0d52479d98d43e48ecd5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768908
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690086}