Revert "[chromite] Capture job_name and git timing for ts_mon in cbuildbot runs."

This reverts commit 7657336de212e6dba55511f3f07457f9add6e3e3.

Reason for revert: Suspected to have blown out our metric memory quota
See https://bugs.chromium.org/p/chromium/issues/detail?id=842423

Original change's description:
> [chromite] Capture job_name and git timing for ts_mon in cbuildbot runs.
>
> Simple overload of existing configuration to provide a means to capture
> the builder config as part of the metric schema.  It is easy to overload
> the schema but using the Task schema limits options for capturing more
> fields.  Will need to examine options for passing metric fields to the
> lower level calls.
>
> Wraps RunGit command in SecondsTimer metric to collect overall durations
> of git calls in metric distributions.
>
> BUG=chromium:829289
> TEST=`./cbuildbot/run_tests` PASS
>
> Change-Id: I23f0fd6e8f4870dffdb87a06b4384f351d93e6c4
> Reviewed-on: https://chromium-review.googlesource.com/1050954
> Commit-Ready: Mike Nichols <mikenichols@chromium.org>
> Tested-by: Mike Nichols <mikenichols@chromium.org>
> Reviewed-by: Jason Clinton <jclinton@chromium.org>

Bug: chromium:829289
Change-Id: I23497c75a6803b7274d9a40e5584c43aa3bf0616
Reviewed-on: https://chromium-review.googlesource.com/1058207
Commit-Ready: Ben Pastene <bpastene@chromium.org>
Tested-by: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Jason Clinton <jclinton@chromium.org>
Reviewed-by: Mike Nichols <mikenichols@chromium.org>
4 files changed