fix doc

Author: RustedBones

monitoring/uss_qualifier/scenarios/astm/utm/dss/uss_availability_mutation.py

@@ -33,7 +33,6 @@ def __init__(
         """
         Args:
             dss: dss to test
-            id_generator: will let us generate specific identifiers
             client_identity: tells us the identity we should expect as an entity's manager
         """
         super().__init__()