Cleanup

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@3072 b32b6428-25c9-4566-ad07-03861ab6144f

devices/assistants/Alexa/xaal/alexa/devices.py

 import logging
 from xaal.schemas import devices
-from xaal.lib import tools,helpers
-
-import logging
+from xaal.lib import tools
 
 logger = logging.getLogger(__name__)
 

devices/assistants/Alexa/xaal/alexa/gw.py

 import platform
 import logging
 
-from xaal.lib import tools,helpers
 from xaal.schemas.devices import gateway
+from xaal.lib import tools
 
 import time
 import shlex