otherwise, it prints rm: cannot remove '.review-app': No such file or directory, which looks like an error when you're scanning CI logs but it isn't one, which is misleading when the build breaks because it's never because of that but it looks like it's an error and it's the first thing you see
closes #187 if done with financial-times/n-heroku-tools#577
otherwise, it prints
rm: cannot remove '.review-app': No such file or directory, which looks like an error when you're scanning CI logs but it isn't one, which is misleading when the build breaks because it's never because of that but it looks like it's an error and it's the first thing you seecloses #187 if done with financial-times/n-heroku-tools#577