Remove forgotten bits of buildbot 0.7.12 compatibility code.
Remove forgotten bits of buildbot 0.7.12 compatibility code.

A second take of https://chromiumcodereview.appspot.com/13560017 but should work now.

R=iannucci@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/20481003

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@217592 0039d316-1c4b-4281-b951-d872f2087c98

luci/recipes-py,luci/recipes-py,shishkander/recipes-py,shishkander/recipes-py