refactor: declare explicit public API in package __init__ modules

gns3server/compute/iou/__init__.py

@@ -23,7 +23,7 @@ import logging
 import os
 
 from ..base_manager import BaseManager
-from .iou_error import IOUError
+from .iou_error import IOUError as IOUError
 from .iou_vm import IOUVM
 
 log = logging.getLogger(__name__)

gns3server/compute/vpcs/__init__.py

@@ -18,7 +18,6 @@
 VPCS server module.
 """
 
-import asyncio
 import os
 
 from ..base_manager import BaseManager