fix checkstyle

Author: ndimiduk

hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java

@@ -63,7 +63,6 @@
 import org.apache.zookeeper.server.ZooKeeperSaslServer;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.apache.hbase.thirdparty.com.google.protobuf.InvalidProtocolBufferException;
 import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;