fs.unlink(path, [callback(err)])

var fs = require('fs');
var filepath = '126.txt';
fs.unlink(filepath, function(err){
 if(err){
  throw err;
 }
 console.log('文件:'+filepath+'刪除成功！');
})

fs.unlink = function(path, callback) {
  callback = makeCallback(callback);
  if (!nullCheck(path, callback)) return;
  binding.unlink(pathModule._makeLong(path), callback);
};