fix: omit {Cluster,Topic}AuthorizedOperations (#821)
fix: omit {Cluster,Topic}AuthorizedOperations (#821)

kafka-go doesn't appear to actually make use of either the
ClusterAuthorizedOperations nor the per-topic TopicAuthorizedOperations
responses anywhere in its code, so this is causing unecessary load on
the brokers as this is a non-trivial thing for them to determine each
time.

Contributes-to: #818

Signed-off-by: Dominic Evans <004bc7ccafd0fb0861c74289c233215b71eabd38@uk.ibm.com>
segmentio/kafka-go