Remove browser_tests from official builder list

interactive_ui_tests and browser_tests both now. :/

TBR=dxie@chromium.org
BUG=330432, 309197

Review URL: https://codereview.chromium.org/130433011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245543 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245543