remove unused import (#7345)

Remove unused import that's slipping past checkstyle somehow

Reviewers: Matthias J. Sax <mjsax@apache.org>, Christopher Pettitt <cpettitt@confluent.io>

streams/src/main/java/org/apache/kafka/streams/processor/internals/StoreChangelogReader.java

@@ -16,7 +16,6 @@
  */
 package org.apache.kafka.streams.processor.internals;
 
-import java.util.Map.Entry;
 import org.apache.kafka.clients.consumer.Consumer;
 import org.apache.kafka.clients.consumer.ConsumerRecord;
 import org.apache.kafka.clients.consumer.ConsumerRecords;