Android buildbot: remove bulach from OWNERS.

Following long discussion at https://chromiumcodereview.appspot.com/23129027/
it's better to keep infrastructure team dealing with all reviews in here.

BUG=None
TEST=None
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/23814005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221677 0039d316-1c4b-4281-b951-d872f2087c98

build/android/buildbot/OWNERS

 set noparent
 
-bulach@chromium.org
 cmp@chromium.org
 ilevy@chromium.org
 yfriedman@chromium.org