Revert "Merge pull request #44 from travis-ci/igor-ruby-version"
Revert "Merge pull request #44 from travis-ci/igor-ruby-version"

This reverts commit 424b51a064cda484ebb2db43a2c0080028c0c9e9, reversing
changes made to 8b5857428810a1140dcc417c88c1fb85be8214f3.

travis-ci/travis-logs,travis-ci/travis-logs