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 51645020c6fd630ec83d5d66d05b13dd40d8d4a4.

norio-nomura/Base32,norio-nomura/Base32