message: remove co::gethostbyname timeout arg.
diff: @@ -45,7 +45,6 @@ ZEND_END_ARG_INFO()
  ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_coroutine_gethostbyname, 0, 0, 1)
  ZEND_ARG_INFO(0, domain_name)
  - ZEND_ARG_INFO(0, timeout)
  ZEND_ARG_INFO(0, family)
  ZEND_END_ARG_INFO()
  @@ -910,10 +909,9 @@ static PHP_METHOD(swoole_coroutine_util, gethostbyname)
  {
  char *domain_name;
  zend_size_t l_domain_name;
  - double timeout = SW_CLIENT_DEFAULT_TIMEOUT;
  long family = AF_INET;
  - if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|dl", &domain_name, &l_domain_name, &timeout, &family) == FAILURE)
  + if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &domain_name, &l_domain_name, &family) == FAILURE)
  {
  RETURN_FALSE;
  }
  