Remove glue code in buildbot.tac for 0.7.12.
Remove glue code in buildbot.tac for 0.7.12.

R=cmp@chromium.org
BUG=

Review URL: https://codereview.chromium.org/11510004

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@182272 0039d316-1c4b-4281-b951-d872f2087c98

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