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Deprecation Timeline

Kafka 4.2

Remove "share" from the valid values for `group.coordinator.rebalance.protocols` (i.e., "share" is not allowed as a value)

Kafka 4.3 (Deprecation Period):

As described in the Proposed Changes, if users explicitly set `group.coordinator.rebalance.protocols` with values missing any of the defaults (classic, consumer, streams), users can still disable protocols, but will receive a deprecation warning advising them to either:
- Use the default values (classic, consumer, streams), or
- Remove the configuration

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