Remove legacy buildpack line from readme
Remove legacy buildpack line from readme

evanjmg/travelpal,toroio-client/wordpress-heroku,evanjmg/travelpal,evanjmg/travelpal,toroio-client/wordpress-heroku,evanjmg/travelpal,toroio-client/wordpress-heroku,evanjmg/travelpal,toroio-client/wordpress-heroku