gistfile1.txt

FileHound.create()
    .paths('./screens', './screens/actual', './screens/diff')
    .ext('MD')
    .not()
    .depth(0)
    .find()
    .then(function (files) {
        for (var i = 0; i < files.length; i++) {
            fs.unlink(files[i]);
            console.log('DELETE: ', files[i]);
        };
    });