code: function rmdirRecursive(root, chunks, callback) {
  
    var chunk = chunks.pop();
    if (!chunk) {
      return callback(null);
    }
    var pathname = path.join(root, '..'); // backtrack
  
    return fs.exists(root, function(exists) {
  
      if (exists === false) { // already done
        return rmdirRecursive(root, chunks, callback);
      }
      return fs.rmdir(root, function(err) {
  
        if (err) {
          return callback(err);
        }
        return rmdirRecursive(pathname, chunks, callback); // let's magic
      });
    });
  }
docs: remove directory recursively
  
  @function rmdirRecursive
  @param {String} root - absolute root where take chunks
  @param {Array} chunks - directories chunks
  @param {Function} callback - next callback