Resolve L2SS-1440 "Modify domain names"

Closes L2SS-1440

tangostationcontrol/tangostationcontrol/devices/observation.py

@@ -10,7 +10,7 @@ import numpy
 from jsonschema.exceptions import ValidationError
 
 # PyTango imports
-from tango import AttrWriteType, DeviceProxy, DevState, Except
+from tango import AttrWriteType, DeviceProxy, DevState
 from tango.server import attribute
 from tangostationcontrol.common.constants import (
     DEFAULT_POLLING_PERIOD,