Drop Topic from Consumer

[Casey Daniell]

We are using Kafka 0.8.1 and have a Consumer that used to pull multiple topics. 
One of these topics is no longer needed by this consumer/group, so when I look 
at 
/usr/local/kafka/bin/kafka-run-class.sh kafka.tools.ConsumerOffsetChecker 
--zkconnect localhost --group <ServerName>
We see the LAG for this measurement is high, but we know why. Is there anyway 
to let ZK know that this consumer group will never catch up for this topic, 
since it's not consumed any longer?