Remove diff-the-rendered-outcomes script
Remove diff-the-rendered-outcomes script

This has served its purpose (see previous commits) so can be removed.

alphagov/smart-answers,aledelcueto/smart-answers,tadast/smart-answers,stwalsh/smart-answers,alphagov/smart-answers,stwalsh/smart-answers,tadast/smart-answers,alphagov/smart-answers,askl56/smart-answers,askl56/smart-answers,tadast/smart-answers,tadast/smart-answers,aledelcueto/smart-answers,aledelcueto/smart-answers,askl56/smart-answers,stwalsh/smart-answers,stwalsh/smart-answers,aledelcueto/smart-answers,askl56/smart-answers,alphagov/smart-answers