Revert of [telemetry] Add WinRing0/MSR power monitor.

Revert of [telemetry] Add WinRing0/MSR power monitor. (patchset #3 id:40001 of https://codereview.chromium.org/536243002/)

Reason for revert:
Not sure but this CL was the only possible reason I could find why we see so many issues on XP.

See http://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%282%29 and 
http://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%282%29/builds/35196/steps/telemetry_unittests/logs/platform_backend_unittest

Original issue's description:
> [telemetry] Add WinRing0/MSR power monitor.
> 
> This is a power monitor that reads the Intel RAPL MSRs to get energy measurements.
> It uses a defunct open source DLL and kernel driver, WinRing0, to access the MSRs.
> WinRing0 is a little wonky, and we have to install the kernel driver to the Python executable's directory.
> Python must be run as Administrator for this to work.
> 
> 
> BUG=336558
> TEST=tools/telemetry/run_tests winring0
> 
> Committed: https://chromium.googlesource.com/chromium/src/+/1f745bba63c18483a8f3c58464bcb01940adb04b

TBR=tonyg@chromium.org,dtu@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=336558
Committed: https://crrev.com/16d191dc56ba69a87ffc8f4c2dd36c6d82fc68a2
Cr-Commit-Position: refs/heads/master@{#293695}

[henrika (OOO until Aug 14), 2014-09-08 09:37:22]

Created Revert of [telemetry] Add WinRing0/MSR power monitor.

[commit-bot: I haz the power, 2014-09-08 09:38:01]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/henrika@chromium.org/547343003/1

[commit-bot: I haz the power, 2014-09-08 09:39:28]

Committed patchset #1 (id:1) as 9944686c7750bb10a280a6ce961aebd226ffd1c1

[commit-bot: I haz the power, 2014-09-10 03:45:22]

Patchset 1 (id:??) landed as
https://crrev.com/16d191dc56ba69a87ffc8f4c2dd36c6d82fc68a2
Cr-Commit-Position: refs/heads/master@{#293695}