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Share Groups has already deprecated and decoupled from this configuration (though still listed in valid values in the config description). 
Both Group Coordinator and Streams rebalance protocol are currently controlled by both the `groupgroup.coordinator.rebalance.protocols` protocols  configuration and their respective feature flags (`group.version` and `streams.version`).

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As described in the Proposed Changes, if users explicitly set `groupgroup.coordinator.rebalance.protocols` 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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