KAFKA-10081: Remove an unused local variable to pass spotbugsMain check

[showuon]

This issue can also reproduce in local environment. I Investigated why the spotbugs failed, and found that there's a warning to an unused local variable.

Dead store to isFreshAssignment in org.apache.kafka.clients.consumer.internals.AbstractStickyAssignor.generalAssign(Map, Map)

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[showuon]

@mjsax @ableegoldman @abbccdda , could you review this PR since it keeps breaking the recent builds.

[ableegoldman]

Thanks for the quick fix!

[mjsax]

Retest this please.

[chia7712]

testReassignmentWithRandomSubscriptionsAndChanges is traced by #8778
testMultiConsumerStickyAssignment is traced by #8777

+1 to merge this hotfix :)

[mjsax]

Java 11: env issue
Java 14:

org.apache.kafka.clients.consumer.CooperativeStickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
org.apache.kafka.clients.consumer.StickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
kafka.api.PlaintextConsumerTest.testMultiConsumerStickyAssignment

Java 8:

org.apache.kafka.clients.consumer.CooperativeStickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
org.apache.kafka.clients.consumer.CooperativeStickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
org.apache.kafka.clients.consumer.StickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
org.apache.kafka.clients.consumer.StickyAssignorTest.testReassignmentWithRandomSubscriptionsAndChanges
kafka.api.PlaintextConsumerTest.testMultiConsumerStickyAssignment
kafka.api.PlaintextConsumerTest.testMultiConsumerStickyAssignment

[ijuma]

Btw, this had already been fixed by a3d79ff .

[mjsax]

Thanks for pointing out. This PR was opened first though :)