Now that testshell depends on imagediff we can start to cleanup the targets added for the bots.  Once the bots are bounced to the new configs, this target could go away completely.
Review URL: http://codereview.chromium.org/159422

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21687 0039d316-1c4b-4281-b951-d872f2087c98