Revert "Merge pull request #25 from kazu634/id/25"

This reverts commit 3948e46b6491b1428e033523ec8c863813864b20, reversing
changes made to 2b66669f1832386e0dd843552aa009774bbed375.

This commit refs #62.
Merge pull request #62 from kazu634/id/62

Chefspecの導入を取りやめる