Revert "Let's see if tests pass on Rubinius"
Revert "Let's see if tests pass on Rubinius"

This reverts commit 54d71d3a64e920e55117a4ea3fcd52ef637dd386.

flores/travis-ci,openeducation/travis-ci,fxposter/travis-ci,openeducation/travis-ci,flores/travis-ci,fxposter/travis-ci,fxposter/travis-ci,openeducation/travis-ci,flores/travis-ci