Minor changes based on AI comments

Author: oto-macenauer-absa

tests/test_safe_serialization.py

@@ -137,7 +137,6 @@ def test_env_defaults_when_not_set(self):
             message = {"password": "secret", "data": "x" * 20000}
             result = safe_serialize_for_log(message)
             # Default should redact 'password' (in default list)
-            parsed_or_truncated = result
             if result.endswith("..."):
                 # Truncated at default 10000 bytes
                 assert len(result.encode("utf-8")) <= 10003

tests/test_trace_logging.py

@@ -28,7 +28,7 @@ def produce(self, *a, **kw):
             if cb:
                 cb(None, object())
 
-        def flush(self, *a, **kw):  # noqa: D401
+        def flush(self, *a, **kw):
             return 0
 
     logger = logging.getLogger("trace.kafka")