This reverts commit 18aa2d93.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> [cipd] Bump version, log at warning.
> 
> Bump the CIPD client version to
> e2a98b41adb3403b5b7771c4101b42a55dc2dd9e. This version inculdes support
> for the "-log-level" flag.
> 
> Update CIPD bootstrap scripts and tool installation scripts to log at
> warning level, so that standard operation doesn't produce any logs.
> 
> BUG=chromium:748651
> TEST=canary
>   - Tested this CIPD version on canary waterfall successfully.
>   - Tested "gclient" bootstrap and "vpython" / "led" on Windows system,
>     no output and works.
>   - Tested "vpython" / "led" on OSX system, no output and works.
> 
> Change-Id: Iae316908283c43c504f293aafdf897df83dccf8d
> Reviewed-on: https://chromium-review.googlesource.com/588889
> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
> Commit-Queue: Daniel Jacques <dnj@chromium.org>

TBR=iannucci@chromium.org,dnj@chromium.org

Change-Id: Ia611c1aeb204c609ff3469076b8256c54e702230
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:748651
Reviewed-on: https://chromium-review.googlesource.com/589527Reviewed-by: Daniel Jacques <dnj@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>