message: Use free_obj
diff: @@ -150,7 +150,7 @@ static void swoole_client_coro_free_object(zend_object *object)
  client_coro *client = swoole_client_coro_fetch_object(object);
  if (client->sock)
  {
  - delete client->sock;
  + php_swoole_client_coro_socket_free(client->sock);
  }
  zend_object_std_dtor(&client->std);
  }
  @@ -631,12 +631,7 @@ static PHP_METHOD(swoole_client_coro, __construct)
  RETURN_TRUE;
  }
  -static PHP_METHOD(swoole_client_coro, __destruct)
  -{
  - SW_PREVENT_USER_DESTRUCT();
  -
  - client_coro_close(ZEND_THIS);
  -}
  +static PHP_METHOD(swoole_client_coro, __destruct) { }
  static PHP_METHOD(swoole_client_coro, set)
  {
  