Revert "Merge pull request #5 from zendesk/amckenzie/env-ruby-2"

This reverts commit a270a2799ca1af725e8e44143e371d1f7a819a0d, reversing
changes made to 1d16d80392ffe2c3acbb555127837b110f38e434.
Revert "Merge pull request #4 from zendesk/amckenzie/env-ruby"

This reverts commit 1d16d80392ffe2c3acbb555127837b110f38e434, reversing
changes made to 6a0cfce5e4e8ed3a1e92dc2c72d876ba6dfc95a8.
v1.6.6