Revert of Make correction to Telemetry command for perf trybot. (patchset #1 id:1...

Revert of Make correction to Telemetry command for perf trybot. (patchset #1 id:1 of https://codereview.chromium.org/1095263004/)

Reason for revert:
Speculatively revert to address Builder XP Tests (1) telemetry_unittests failure:

http://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/builds/37100

[135/828] telemetry.core.backends.remote.trybot_browser_finder_unittest.TrybotBrowserFinderTest.test_find_all_browser_types_list failed unexpectedly:
  Traceback (most recent call last):
    File "E:\b\build\slave\XP_Tests__1_\build\src\tools\telemetry\telemetry\core\backends\remote\trybot_browser_finder_unittest.py", line 70, in test_find_all_browser_types_list
      sorted(trybot_browser_finder.FindAllBrowserTypes(finder_options)))
  AssertionError: Lists differ: ['trybot-all', 'trybot-all-and... != ['trybot-all', 'trybot-all-and...

  First list contains 1 additional elements.
  First extra element 6:
  trybot-mac-10-9

    ['trybot-all',
     'trybot-all-android',
     'trybot-all-linux',
     'trybot-all-mac',
     'trybot-all-win',
  -  'trybot-android-nexus4',
  ?                         ^

  +  u'trybot-android-nexus4']
  ?  +                       ^

  -  'trybot-mac-10-9']

Original issue's description:
> Make correction to Telemetry command for perf trybot.
>
> BUG=477285
>
> Committed: https://crrev.com/e983006d8ae7dc89b651fc36adc57666b97ae38d
> Cr-Commit-Position: refs/heads/master@{#326148}

TBR=sullivan@chromium.org,prasadv@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=477285

Review URL: https://codereview.chromium.org/1080953004

Cr-Commit-Position: refs/heads/master@{#326246}