remove 2 submodules
subrepo clone: git@github.com:cloudfoundry/heroku-buildpack-nodejs.git (master) -> buildpacks/vendor/nodejs/

  subdir: buildpacks/vendor/nodejs
  remote: git@github.com:cloudfoundry/heroku-buildpack-nodejs.git
  branch: master
  commit: 0758a34

git-subrepo version: 0.1.0
Merge subrepo commit 'd77b610'
subrepo clone: git@github.com:cloudfoundry/heroku-buildpack-ruby.git (master) -> buildpacks/vendor/ruby/

  subdir: buildpacks/vendor/ruby
  remote: git@github.com:cloudfoundry/heroku-buildpack-ruby.git
  branch: master
  commit: 2fc4ad8

git-subrepo version: 0.1.0
Merge subrepo commit '7eddfb3'