Revert "Merge pull request #44 from alphagov/sensu-git-dep"

This reverts commit cbca56e074577211b71d9c7dfae0726ed6dc3201, reversing
changes made to a71da2b79772c8f227b97b930a25177650b56953.
Merge pull request #45 from alphagov/revert-git-dep

Revert "Merge pull request #44 from alphagov/sensu-git-dep"