code: function unlinkPrevious(callback) {
    fs.unlink(path.resolve(yeoman, 'bootstrap-less'), function(err) {
      if (err) return console.log('unlink error:', err);
      console.log('Previous version of yeoman-bootstrap successfully unlinked...');
      return callback();
    });
  }
docs: console.log('yeoman path:', yeoman); console.log('bootstrap path', bootstrap); 
  Remove existing symlink to bootstrap generator