Platform changes prevent unacceptable env vars
Platform changes prevent unacceptable env vars

Due to platform changes we can no longer set weird env var names. This test was for a very intermittent problem not likely to reproduce again, we can safely get rid of this test for now and reintroduce if needed.

Originally introduced in 

- https://github.com/heroku/heroku-buildpack-ruby/pull/229
- https://github.com/heroku/heroku-buildpack-ruby/commit/8b6126f1497a85dff8b897bf0426b5d8333c6d7f

tpope/heroku-buildpack-ruby-tpope,makifund/heroku-buildpack-ruby,moneyadviceservice/heroku-buildpack-ruby-bowndler,jumptvs/BP_Ruby,qnyp/heroku-buildpack-ruby-bower,pilotcreative/heroku-buildpack-ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox,cloudfoundry/ruby-buildpack,cloudfoundry/ruby-buildpack,zoomer/heroku-buildpack-ruby-bower,moneyadviceservice/heroku-buildpack-ruby-bowndler,jumptvs/BP_Ruby,ekaranto/rails4-bluemix-buildpack,tenjikinc/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,zunda/heroku-buildpack-ruby,tpope/heroku-buildpack-ruby-tpope,jonseaberg/heroku-buildpack-turbo-sprockets,brightbytes/heroku-buildpack-ruby-without-assets-precompile,andycroll/heroku-buildpack-jekyll,cloudfoundry/ruby-buildpack,tenjikinc/heroku-buildpack-ruby,vhx/heroku-buildpack,beydogan/ruby-buildpack,zunda/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,andycroll/heroku-buildpack-jekyll,mattmanning/heroku-buildpack-ruby-jekyll,bwaite-jaroop/heroku-buildpack-ruby,Scalingo/ruby-buildpack,pilotcreative/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,donnykurnia/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,ekaranto/rails4-bluemix-buildpack,ericboehs/heroku-buildpack-ruby,mattmanning/heroku-buildpack-ruby-jekyll,jonseaberg/heroku-buildpack-turbo-sprockets,orenyk/heroku-buildpack-ruby,vhx/heroku-buildpack,bwaite-jaroop/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,pkgr/heroku-buildpack-ruby,makifund/heroku-buildpack-ruby,jumptvs/BP_Ruby,cloudfoundry/ruby-buildpack,orenyk/heroku-buildpack-ruby,cloudfoundry/ruby-buildpack,donnykurnia/heroku-buildpack-ruby,qnyp/heroku-buildpack-ruby-bower,zoomer/heroku-buildpack-ruby-bower,Genius/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,Scalingo/ruby-buildpack,ericboehs/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,ruby/heroku-buildpack-www-ruby-lang,beydogan/ruby-buildpack,jumptvs/BP_Ruby,markaschneider/heroku-buildpack-ruby-ffmpeg-sox