[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

cloudevents/kafka/conversion.py

@@ -21,7 +21,6 @@
 from cloudevents.kafka.exceptions import KeyMapperError
 from cloudevents.sdk import types
 
-
 JSON_MARSHALLER: types.MarshallerType = json.dumps
 JSON_UNMARSHALLER: types.UnmarshallerType = json.loads
 IDENTITY_MARSHALLER = IDENTITY_UNMARSHALLER = lambda x: x