Revert of Bot Update support on official builders (https://codereview.chromium.org/238063010/)
Revert of Bot Update support on official builders (https://codereview.chromium.org/238063010/)

Reason for revert:
This might be causing a failure here: http://build.chromium.org/p/chromium.linux/builders/Android%20Webview%20AOSP%20Builder/builds/10475

Doing a speculative revert.

Original issue's description:
> Bot Update support on official builders
> 
> BUG=
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=265371

TBR=agable@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/248303002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@265379 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build