Revert "[Travis] Workaround for https://github.com/travis-ci/travis-ci/issues/7031"
Revert "[Travis] Workaround for https://github.com/travis-ci/travis-ci/issues/7031"

This reverts commit 848d5e381995969415bbf1121aa1f721900fff36.

jpsim/Yams,jpsim/Yams,jpsim/Yams