fixup! Add a utility to convert protobuf enums to Python enums

Remove explicit conversion to int

Author: llucax

src/frequenz/client/microgrid/_util.py

@@ -41,9 +41,6 @@ class SomeEnum(enum.Enum):
         The resulting python enum value if the protobuf value is known, otherwise
             the input value converted to a plain `int`.
     """
-    # A protobuf enum value is a NewType of int, so we make sure we have a pure int at
-    # this point.
-    value = int(value)
     try:
         return enum_type(value)
     except ValueError: