Remove getting message on launch finish, since there is no such field in this response.

Author: HardNorth

reportportal_client/aio/client.py

@@ -445,10 +445,8 @@ async def finish_launch(
         ).make()
         if not response:
             return None
-        message = await response.message
         logger.debug("finish_launch - ID: %s", await await_if_necessary(launch_uuid))
-        logger.debug("response message: %s", message)
-        return message
+        return ""
 
     async def update_test_item(
         self,

reportportal_client/client.py

@@ -771,12 +771,8 @@ def finish_launch(
             if not response:
                 return None
             logger.debug("finish_launch - ID: %s", self.__launch_uuid)
-            logger.debug("response message: %s", response.message)
-            message = response.message
-        else:
-            message = ""
         self._log(self._log_batcher.flush())
-        return message
+        return ""
 
     def update_test_item(
         self, item_uuid: str, attributes: Optional[Union[list, dict]] = None, description: Optional[str] = None