code: function removePIDFile(name) {
    var pidFilePath = pidDir + name + '.pid';
    fs.exists(pidFilePath, function(exists) {
      if (exists) {
        fs.unlinkSync(pidFilePath);
      }
    });
  }
docs: /*
  removes the pid file of the child process
  this only runs if the process is terminated cleanly
  
  @param {string} process name