Revert of Support proper retrying of telemetry_unittests in recipes

Revert of Support proper retrying of telemetry_unittests in recipes (https://codereview.chromium.org/417883002/)

Reason for revert:
Broke telemetry_unittests:
http://build.chromium.org/p/chromium.mac/builders/Mac10.6%20Tests%20%283%29/builds/50387/steps/telemetry_unittests/logs/RecordWprUnitTests

Original issue's description:
> This patch ports the retry logic we had for mojo_python_tests over to telemetry_unittests and telemetry_perf_unittests, since they are using
> the common syntax for retries.
> 
> (I actually refactored the code to be shared in a new PythonBasedTest step class).
> 
> Note that we still don't upload the results to the flakiness dashboard yet, though. Adding that should will be straightforward.
> 
> R=phajdan.jr@chromium.org
> BUG=359521
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=285595

TBR=phajdan.jr@chromium.org,dpranke@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=359521
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=285615

[dmichael (off chromium), 2014-07-25 17:51:16]

Created Revert of Support proper retrying of telemetry_unittests in recipes

[commit-bot: I haz the power, 2014-07-25 17:51:44]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/dmichael@chromium.org/419673005/1

[commit-bot: I haz the power, 2014-07-25 17:52:50]

Change committed as 285615

[Dirk Pranke, 2014-07-25 18:29:30]

On 2014/07/25 17:52:50, I haz the power (commit-bot) wrote:
> Change committed as 285615

lgtm. thanks for the revert! I'll look into the failure.