Remove "Executing tests" section
Remove "Executing tests" section

This already appears in README.md.

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