Remove Test Accounts service client

Remove Test Accounts service client

This service was used as part of a previous Sync end-to-end testing
effort and is no longer used.

BUG=NONE

Committed: https://crrev.com/9fdec26ebe2e43f060d261cf2bdf8df935410ec5
Cr-Commit-Position: refs/heads/master@{#330144}

[pval...(no longer on Chromium), 2015-05-15 01:08:11]

pvalenzuela@chromium.org changed reviewers:
+ dpranke@chromium.org, maniscalco@chromium.org

[pval...(no longer on Chromium), 2015-05-15 01:08:12]

dpranke@ for top-level build files
maniscalco@ for sync code

[Dirk Pranke, 2015-05-15 03:17:02]

lgtm

[maniscalco, 2015-05-15 15:35:54]

lgtm

[pval...(no longer on Chromium), 2015-05-15 17:28:29]

The CQ bit was checked by pvalenzuela@chromium.org

[commit-bot: I haz the power, 2015-05-15 17:29:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1138113003/1

[commit-bot: I haz the power, 2015-05-15 18:38:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-15 18:39:29]

Patchset 1 (id:??) landed as
https://crrev.com/9fdec26ebe2e43f060d261cf2bdf8df935410ec5
Cr-Commit-Position: refs/heads/master@{#330144}