remove special error handler from addons
remove special error handler from addons

these are here for historical reasons; the generic handlers under
Heroku::Command.prepare_run are going to do a much better job now.

more specifically this will make sure addons commands are going to
follow generic auth rules like requesting for 2fa

gregburek/heroku,rkh/heroku,macedo/heroku,Faisalawanisee/heroku,greeca0204/heroku,gregburek/heroku,sancopanco/heroku,greeca0204/heroku,vcgato29/heroku,duypq94/heroku,dickeyxxx/heroku,Faisalawanisee/heroku,greeca0204/heroku,macedo/heroku,vcgato29/heroku,vcgato29/heroku,sancopanco/heroku,macedo/heroku,sancopanco/heroku,duypq94/heroku,rkh/heroku,gregburek/heroku,duypq94/heroku,dickeyxxx/heroku,dickeyxxx/heroku,rkh/heroku,Faisalawanisee/heroku